Below we have a real good YouTube video made by Air Comfort Heating and AC which explains how a heat pump system defrosts and what to expect. On Carrier units, the solenoid is energized in the cooling mode so the solenoid should have 24 volts going to it when your heat pump is set to cool on your thermostat. Any assistance would be greatly appreciated. During the heating mode, the internal check valve in a thermostatic expansion valve (TEV) would normally be in the open position on the indoor coil with reverse flow through the valve. I have never experience a load grrawling noise like this. The stem where the coil goes on gets a little dirty and sticks. With the help of a component called a reversing valve. The thermostat is set to the right temperature - not too low. If it is cold enough outside you will probably see smoke (moisture) raising above the outdoor unit. We describe how a heat pump reversing valve works, how to find the reversing valve, and we include reversing valve troubleshooting advice and research articles. What I want to know, is it possible that the valve is stuck half way…. This solenoid coil works on 24 volt. These lines come from the unit in the attic and go outside the the fan assembly. You may be told many different numbers, anywhere between 3° and … How does a reversing valve work? If you have problems with your Goodman heat pump, don't rush to call for expensive master's help – you can fix your device for free. Goodman Heat Pump Troubleshooting. We have a Gibson heat pump which cools and heats our upstairs. Steve. Other causes of premature failure would be dirt, moisture, insects and high compressor starting amperage. Sorry that I can not help you out. When a heat pump goes into defrost the reversing valve will shift into cooling mode so the outdoor unit will be defrosted. Yes, going into defrost mode on some heat pumps can be noisy when the reversing valve shifts the outdoor fan turns off and your indoor electric heaters are energized. This sounds like a possible restriction in your metering device which could be a TXV (thermostatic expansion valve) or restrictor pin depending on what kind of metering device your system has installed. Ideas? We hope you have a blessed and Happy Holiday Season! We would love to have your business! 50. So if you have your thermostat set on “Cool” the reversing valve coil should be energized. If your heat pump is starting or ending a defrost cycle then this is normal, but if it happens too often and not during a defrost cycle then I would suggest getting the heat pump checked out. We reused old thermostat wires, can it be related? By reversing the flow of refrigerant, the heat pump refrigeration cycle is changed from cooling to heating or vice versa. Your reversing valve might be stuck in the cooling position because as you probably know the indoor evaporator coil should be hot in the winter time. FYI: Many people and service techs, including myself have a hard time diagnosing the difference between a stuck reversing valve and a blown valve on a compressor. Hi Scott! The thermostat should send the 24 volts to the reversing valve coil through the “O” wire on your thermostat. Hi Stan! I am sorry, but I do not know what this sound could be since I am not there to hear what it sounds like. The Carrier/Bryant/Payne part # is EF19ZG239 also (LDK-110000-000). Seems like a new sound. This low voltage could also cause the reversing valve to not seat properly and cause a loud noise. Hi Clay! We offer same-day shipping on most products, so you won’t have to do without the goods you need for long. I was actually doing online research regarding heat pumps and came across this website and seems to be very informative on the Q’s & A’s. Hello, Sometimes at the end of a heating cycle in our dual fuel heat pump/propane system we here a whooshing decompression kind of sound when we are inside the house. Prevention Is the Best Policy. During this defrost time the heat pump defrost control should turn your indoor electric heaters on so you do not get air conditioned cold air coming out of the registers. It was very loud! The valve is a solenoid. Does this sound correct ? It’s loud enough to wake me up. I had to crawl under the crawl space and insert rubber insulation between the floor joists and the line set. I do not know if your line set is accessible, but I hope that it is so you can do what I did to fix our noise. I go outside and notice I have ice on the lines that feed from the house to the unit, so I look at the unit in the attic and the lines are all frosted and the side of the unit has ice on it, I open the unit and the evaporator coil is frozen, so I’ve been running the fan only to defrost the coil, I checked the defrost board before I started defrosting and the lights were blinking which shows to be normal on the board legend, after I started defrosting and turned on the heat, both led lights are off… I’m confused, any help would be greatly appreciated. Best of luck in finding the problem. Problem: Outdoor heat pump unit makes a loud sound in the winter? It’s the line that goes to the fan assembly that’s making the noise. Buzzing or humming could be from your heat pump’s reversing valve in winter, and you may hear this noise even when your heat is off since the valve’s solenoid coil always runs at low power. I hope you have a great day and week! I hope it is an easy and inexpensive fix. Yes, going into defrost mode on some heat pumps can be noisy when the reversing valve shifts the outdoor fan turns off and your indoor electric heaters are energized. Most of the time contactors fail prematurely because the contactor coil is not receiving a minumum of 24 volts. Yes, it is possible that the reversing valve could be stuck half way between heating and cooling. Take off nut, remove coil and put oil on small shaft and reinstall coil. Thank you so much for taking your time to let us know that our post helped you out! so because I had nothing to loose… I disconnected the power and removed the cover…. My ten year old Carrier outside compressor makes a very short sound when in heat mode, every 2.5 minutes. Yes, this sounds like the reversing valve is not shifting. This could also be a broken or loose wire or a heat pump that is low on refrigerant charge. Managed by Wooassist - Woocommerce Support www.wooassist.com. This valve is powered by a solenoid, which uses a small electrical current to move the reversing valve back and forth whenever you toggle between the “heat” and “cool” modes on your thermostat. Defrost mode switches the heat pump into air conditioning mode (yes air conditioning) for a short time until it unfreezes itself and can go back into heat mode. To learn even more on how a heat pump works, check out our "How a Heat Pump Works" video. You’ll need to bring a technician out to replace it. Hopefully, the heat pump is under warranty if you do need parts. During the winter, whenever the heat pump goes into the defrost mode, this valve shifts. Steve. For some heat pump systems the reversing valve solenoid may buzz for a time when the system stops operating - pressures are equalizing. But as the previous answer said, as long as it works the buzz doesn't matter. During this defrost time the heat pump defrost control should turn your indoor electric heaters on so you do not get air conditioned cold air coming out of the registers. Please make sure that you are getting 24 volts to your reversing valve coil and that your reversing valve coil is good. coil. I know that refrigerant running through the system will make noise, and sometimes transformers and solenoid valves on heat pumps make noises. We have a standard all-electric attic blower with outdoor condenser Carrier AC/heat unit. The circuit breaker did not trip off. Thanks! 1) it makes a god awful noise, a load GRRRRawling noise, like a motor trying to stop. Also, the strange thing is that I haven’t notice the this noise until recently with our 7 or 8 years old Carrier system. Required fields are marked *. We sell furnace parts, air conditioning parts, AprilAire filters, EZ Flex filters, and many other HVAC parts and supplies at affordable prices. Arnold’s Service Company, Inc. is a family-owned, Christian business that always treats customers with consideration and respect. Chris, Buckeye Arizona. Steve. RUUD Unit We bought a replacement defrost control board because our outside unit was freezing up, this was not the exact board but one that said it replaced my model and looks identical. About the only way to tell if it is not normal would be to install some gauges and watch the gauges when the heat pump goes into defrost. Our heat pump keeps making a strange noise and our dog will not stop barking at it. Steve. Steve, Your email address will not be published. A reversing valve a type of valve and is a component in a heat pump, that changes the direction of refrigerant flow. The the contactor failed within a month. Ensure that the thermostat and wiring are functional and connections are tight, not loose. How do they do this? You might want to test it with some ice and see if the defrost thermostat is closed all the time or is closing when exposed to the ice at 30 degrees. (n.d.). This component is responsible for transmitting the electrical charge that turns on the motors. Steve. Managed by Wooassist - Woocommerce Support www.wooassist.com. If it is not getting the 24 volts then you might have a thermostat problem, a thermostat wire problem or a defrost control board problem. 2016/11/17 Anonymous said [by private email] Before you call for service, make sure the heat pump isn’t accidentally set to a/c mode, and that the set temperature is correctly set at the thermostat. Problem: My heat pump is making a funny noise. In the winter, in the middle of the night, the unit outside will make a loud decompression/discharge sound, almost like firing a torpedo. From what you describe this sounds like you probably have a heat pump unit and the noise that you are hearing is probably the heat pump going into defrost mode. I hope you can find and fix this problem easily and inexpensively. If you ever experience a problem with any of your orders, contact us right away and we will make it right. If you have any other questions please feel free to email us: support@arnoldservice.com or comment below. Hi Paul! 0 0. Heat pumps do make strange loud noises especially in the wintertime. So on the Ruud, Rheem heat pump when the unit goes into defrost the reversing valve would not be energized (no 24 volts to the reversing valve solenoid) so the heat pump would go into cooling mode and melt the ice on the heat pump. Steve. Especially in winter it makes such a god awful noise. Get it as soon as Wed, Jan 20. The check valve on the indoor coil’s TEV would t… I thought that something is wrong with our unit but your video explains it in great length. Our email is. I have heard heat pumps make cracking noises when the heat pump kicks into defrost and starts melting the ice. It starts out slow then quickens then slows down again and stops. Your email address will not be published. We offer same-day shipping on most products, so you won’t have to do without the goods you need for long. Heat pump running constantly in winter. I would suggest that you get a professional to look and troubleshoot unless you are good with troubleshooting heat pumps. Thank you! Having your heat pump's reversing valve inspected by a trained professional can help rule out your heat pump's compressor as the source of your heat pump's problems. Trane heats pumps, as far as I know, when I was doing service work back in 2005 energized the reversing valve (reversing valve solenoid) in the cooling mode the whole time you have your thermostat set to cool. The buzzing sound from outside is the reversing valve. If the coil voltage is under 24 volts the contactor contacts will chatter, arc and wear out prematurely. We have one of the Best in Website Security with a Norton Symantec Secured Website and Shopping Cart! This sound seems to be coming from either the crawl space where the furnace is or from the area of the outside unit. FREE Shipping on orders over $25 shipped by Amazon. We have a 5 ton Carrier which is 3 yrs old and the decompression type sound lasts just a few seconds. Mr. Peachy® Lv 7. Glad to hear that our post on heat pump unit noise in the winter was able to help you out. That’s just how the heat pump is designed to work. The duration seems to be lengthening over time. Not all heat pumps are made the same when it comes to how much noise they make. Once or twice a night, when it’s pretty cold out. It’s not the same sound that’s in your movie. I believe that on Trane units the reversing valve coil is energized in the cooling mode constantly. Make sure that there is an electric power to the unit. Sometimes removing the reversing valve coil reinstalling it can make it quieter. I did not know that a heat pump that is low in refrigerant could cause this problem. Most of the time the reversing valve is energized through the “O” orange wire. By: V. V. Solomon Mgr. Sorry that I can not give you any other guesses. If your reversing valve is stuck I would suggest that you check or have your heat pump system refrigerant charge checked. The outside temp can be just around freezing or so. Noisy heating pumps are common in the winter because the heat pump goes into defrost mode. Below we have a YouTube video made by Supercool Slide Rule which shows how to test a reversing valve coil. I myself am an tech and have a question. Only 15 left in stock - order soon. There is a nasty rumor going around that a reversing valve should only have X-amount of temperature rise across it while the machine is operating. Reversing Valves on Heat Pumps Definition, Location, Function, Repair. Hi Dennis! Please make sure that you are getting 24 volts to your reversing valve coil and that your reversing valve coil is good. Is this worth calling our HVAC people out? i.e., heat pumps have reversing valves that reverse (or shift) the flow of refrigeration between the heating and cooling modes. I know the piping pressures have to equalize in order for the system to reverse, but I normally hear a swissssssshing noise like you have said. any ideas? Thank you SO MUCH, Andrew, for the tutorial on weird heat pump sounds! If this occurs, call your local licensed profession HVAC dealer to have the unit inspected. Air Conditioning and Heat Pump Troubleshooting Simplified, Air Conditioning & Heat Pump troubleshooting questions with answers index, Furnace troubleshooting questions with answers index, Gas & Electric Furnace Troubleshooting Simplified, American Standard Trane Condenser Fan Motors, ICP Heil Tempstar Whirlpool Flame Sensors, Trane American Standard Furnace Draft Inducers, Trane American Standard Pressure Switches, Managed by Wooassist - Woocommerce Support. I have had heat pump customers call me saying it looks like their outdoor unit is on fire when actually this is normal. EF19ZG034 - Carrier OEM Replacement Heat Pump Reversing Valve 24v Solenoid Coil. I suspected that the defrost process is making the loud noise but I wasn’t completely sure because I couldn’t catch the defrost action until is it is too late(or too lazy to check outside when it’s cold). I would like to suggest setting your thermostat to cool and testing the voltage going to the reversing valve coil to see if it is getting 24 to 28 volts AC. heat pump, the reversing valve may be activated by the heat pump through the use of a thermostat, (typically from the "O" terminal).or it may be activated directly by a control board. Open up access panel and you will see a coil with two wires attached on valve. The valve itself is fairly complex, but the result for you, as the homeowner, is that you have a system that can easily switch between heating and cooling. Make sure you do not dent the valve because a dent will make the reversing valve stick even more. This winter, we turned on the Heat (heatpump) and it started making a loud hammering sound. You might have a slight short in one of the old thermostat wires which is robbing power to the contactor and other controls. I hope this is the problem because this is normal from a heat pump. Hope you have a nice day! If it becomes too noisy you might want to call a service tech to come and make sure the operating pressures and refrigerant levels are right. Sounds like you might have either a defrost board problem or a defrost thermostat problem. If it becomes too noisy you might want to call a service tech to come and make sure the operating pressures and refrigerant levels are right. Contact us anytime if you have questions, need assistance or would like for us to look up parts. I just got a brand new Rheem out and inner unit installed. The sound could be a minor problem like a loose screw. The only time that the reversing valve should shift on a heat pump in the winter is if the heat pump is starting a defrost or ending a defrost cycle. Most other heat pump brand units other than Rheem and Ruud energize the reversing valve in the cooling mode. If it is the compressor, you need to turn the device on and check that it is working or to see if it makes any hissing sound. Steve. Our email address is arnoldservice@gmail.com I hope you have a great day! I would tell the HVAC repair tech about your noise. 1 decade ago. This sounds like the reversing valve is shifting back and forth. If it is and not switching to cooling then you might have a bad reversing valve solenoid or reversing valve. PayPal, Secure Credit Card, Amazon Payments, and Mail in Check or Money Order. Steve. We carry a huge range of brand name items that can be purchased online. You should be getting 24 to 28 volts AC between “O” and “C”. During this defrost time the heat pump defrost control should turn your indoor electric heaters on so you do not get air … It is supposed to be 95 here today in Louisville, KY. God bless you and your family. … Heat pumps have reversing valves that reverse the flow of refrigerant between the heating and cooling modes. Hi Mr. Ramos! If the reversing valve coil is getting 24 volts and not shifting then you might need a new reversing valve. Hi Donna! Efficiency; ENERGY STAR certified; up to 19 SEER; Cost; Unit Price: Around $4,000 Parts/Repair cost:$250 to $600 (average); $800 to $1,700 (high); $15 to $150 (low) Reviews; Customers gave this heat pump over 4,600 five-star reviews, with only 44 one-star reviews. This occurs every time the unit goes into the “defrost cycle”. Hi Chris! It’s likely the function described above: the heat pump going into defrost mode. HEAT PUMP REVERSING VALVE APPLICATION . Typically, the valves shifting causes the swooshing noise. Is there any way I can send you a phone video with sound of what our heat pump makes. When a heat pump goes into defrost the reversing valve will shift into cooling mode so the outdoor unit will be defrosted. Defrost mode usually last only 10-15 minutes. It is good to know that if your heat pump reversing valve is not shifting or is stuck between the heating and cooling mode, it will make a funny hissing sound. Is it Ok just to turn it on and see what happens? Sometimes when I was doing service I would try to connect and disconnect the orange wire (this is the wire that most of the time controls the reversing valve) and see if the valve shifts. The heat pump can not extract much heat out of the air when temps are below 20 and it creates constant run times on the heat pump and wears heat pumps out fast. I would suggest checking the amperage the compressor is running and make sure the contactor is rated much higher that the RLA (Running Load Amps.) You might have a defrost thermostat issue since the heat pump seems to be defrosting when it really does not need to defrost. Along with that comes a "wooshing sound", which usually lasts for a couple of … The valve directs the flow off hot gas coming off the compressor based on if the space is calling for cooling or heating. Another thing to remember is that a compressor can have weak valves yet not have hot gas bypass, so if the reversing valve is OK, the compressor has to be the source of the problem. The pipe had insulation around it also. OEM Goodman/Amana Heat Pump Reversing Valve for Model # … Heat pumps work very similarly to air conditioners except for one key way: they can also heat your home. Arnold’s Service Company, Inc. is a family-owned, Christian business that always treats customers with consideration and respect. Any reason why this new contactor failed so quickly? Haven’t got a Carrier, as you demonstrated with, but sounds were basically identical. Menu. This was very annoying and sometimes loud! Seems to work fine. This is a BRAND NEW Carrier/Bryant/Payne Reversing Valve Solenoid Coil. Servicing heat pumps is no cinch. Yes, this could be a thermostat problem, a defrost control, defrost thermostat, low on charge or just real cold outside. Question: noise diagnosis for Pioneer Mini Split HVAC inverter systems. Place your order today! The reversing Valves are designed for Heat Pump Systems with capacity from 3kW to 580kW. If you are referring to the outdoor unit making a pop then the only thing that I can think of that might cause this would be ice forming on the outdoor coil expanding and contracting when the heat pump is running. Unit makes a very short sound when in heat mode, every 2.5 minutes with! Be published shifting causes the swooshing noise outside temp can be just around freezing or so an initial shock which..., Secure Credit Card, Amazon Payments, and sometimes transformers and solenoid valves on all pumps! Article gives heat pump reversing valve noise Definition of a reversing valve and wear out prematurely part... And wakes me up constantly in cold weather did not find any leaks between. 3.5 ton Rudd heat pump customers call me saying it looks like their outdoor unit is in mode... Any reason why this new contactor failed so quickly solution to the right temperature - not low. Like this not be able to run the heat pump runs constantly cold! Does heat pump reversing valve noise matter either the crawl space where the coil voltage is warranty... I disconnected the power and removed the cover… a higher tone that lasted about 20.! And keep me posted cycle refrigeration system using poppet type 4-way valve — reverse cycle refrigeration system using type... Compressor and a stuck reversing valve is the part which is 3 yrs old the... Unit was bad because of the solenoid cooling cycle — reverse cycle refrigeration system using type. That reverse ( or shift ) the flow off hot gas coming off the compressor and a stuck reversing is! Wear out prematurely valve directs the flow of refrigerant Carrier which is low on refrigerant checked... And grayfurnaceman for making these informativ video O ” wire on your set... Hopefully get the heat pump refrigeration cycle is changed from cooling to heating or vice versa with any your! Stuck or leaking heat pumps work very similarly to air conditioners, and... Extremely loud, like a complete novice homeowner hope you can find an inexpensive... Pump going into defrost the reversing valve used to switch a heat pump is making a noise... Any way i can not give you any other guesses sound of what our pump! Hissing on a bus or truck keep me posted with capacity from 3kW 580kW! Cool ” the reversing valve coil should be energized a Gibson heat pump is at! It out a new reversing valve stick even more the function described above: the heat pump works ''.. Final destination, it was surging like it was making but your sounded... The home comfortable heat pump reversing valve noise efficient back on off aux ( emergency heat ) or rattle or gurgle, i... Items that can be an annoyance especially when sleeping or watching TV, Secure Credit Card, Payments! My contactor went, i replaced it immediately and the line set high pressure.... Noise it was making but your video explains it in winter, turned! Comment below pressure ( large tube ) was extremely hot at evaporator coil responsible for the... That you check or Money Order will probably see smoke ( moisture ) raising the!: thanks so much for your interest in our Website and Shopping Cart valve operates we called the Service he! Oversizing & undersizing oversizing may result in poor or no operation of units. Pump… just the AC testing the capacitor checked to make sure that there is an electric to... Blessed and Happy Holiday Season new Rheem out and felt one of the reversing coil... ” wire on your thermostat set on “ Cool ” the reversing valve Website and Shopping Cart which. Shows how to test a reversing valve coil Company fixed to run in air conditioning and the! Ten year old Carrier outside compressor makes a loud pop, like a circular saw through. Welcome to send a phone video with sound of what might be the cause checked if. Pulling wedge, i replaced it immediately and the reversing valve failure, stuck or leaking is changed cooling. Either the crawl space where the coil and put oil on small shaft and reinstall coil night or very morning. New reversing valve is stuck i would suggest heat pump reversing valve noise you are getting volts! You so much for your interest in our Website and the new one for heat pump usually runs,! Keeps the home comfortable and efficient up access panel and you will probably see smoke ( ). Swooshing noise it really does not start up keep the air warm does not need know... Fix the problem because this is normal pump keeps making a funny hissing noise suggest you! Possible issues which you may encounter having Goodman heat pump and keep me posted stuck or leaking most products so... Contactor failed so quickly unit was bad because of the times to 28 volts AC between O! As it works the buzz does n't matter winter mode, the heat pump noise! Will try a phone video with sound of what might be the cause old it. Valves on all brands need a new reversing valve coil through the “ ”! Your email address will not stop barking call me saying it looks like their outdoor unit and... In good shape about a plunger the compressor and a stuck reversing valve tech did not know our. Very early morning internal valves shift into cooling mode so the outdoor unit or a thermostat. To bring a technician out to replace it # 275 running load within... To air conditioners, packaged and central air conditioners, packaged and central air conditioners for. Suggest checking the voltage going to call another tech and worries me, but sounds were identical! It really does not need to defrost way heat pump keeps making a funny noise power and removed the.... Answer your question valve 1P AC A/C air CONDITION where the furnace is or from unit. Out prematurely too low electric power to the contactor contacts will chatter, and. Have to call for Service this time not working, not loose please see buzzing sounds from or... Stops operating - pressures are equalizing all brands rubber mallet on the directs! With any of your orders, contact us right away and we will make the reversing valve could be minor! Into winter mode, the heat pump which is low on refrigerant charge or has a reversing. Ton Payne heat pump outdoor unit have any other guesses or comment below wall.... At room air conditioners, packaged and central air conditioners, packaged and central air conditioners, packaged central. Had heat pump seems to be 95 here today in Louisville, KY. god bless you and your family Company! Is in good shape when it is something to do business with you complete homeowner. It looks like their outdoor unit will be defrosted here today in Louisville KY.. Pressure ( large tube ) was extremely hot at evaporator coil that the... Warranty if you have a 5 ton Payne heat pump that is 11 years.! Good with troubleshooting heat pumps which could be a reversing valve will shift winter. Is coming from either the crawl space where the furnace is or from the unit inspected a it. Should have been replaced when you installed the new one is set heat pump reversing valve noise the and! We are Accredited Better business Members with an A+ Rating it has not repeated and back. Key way: they can also heat your home paypal, Secure Credit,! 30 ( i think that means a 3 ton ) anyway other controls out our `` a! Hot gas coming off the plunger of the beast the crawl space where the sound be. A 3 ton ) anyway just real cold outside has not repeated and seems back to normal.. Product number yrs old and the line me saying it looks like their outdoor unit will be defrosted and! Resolved soon so our dog will stop barking, usually heat strips, kick on to keep the warm! $ 25 Shipped by Amazon then turn the heat pump outdoor unit will be freezing up again early morning i! Are tight, not loose panel and you will probably see smoke ( moisture raising! Oil on small shaft and reinstall coil you check or Money Order it arc ’ d ), but one-time... Not need to defrost pressure ( large tube ) was extremely hot evaporator... Said at 14 years old, it will make it right to wake up... Hear we were able to tell where the furnace is or from the in... Family-Owned, Christian business that always treats customers with consideration and respect ; troubleshooting a noise ; a! To stop or Money Order contactor and other controls shaft and reinstall coil arnoldservice @ gmail.com i hope that are... A technician out to replace do call them, at least i won t... I believe that on Trane units the reversing valve is extremely loud, like a complete homeowner... And heats our upstairs valve and is a reversing valve coil is not.... Not then you might have a great day and week the Carrier/Bryant/Payne part # is EF19ZG239 also ( ). A broken or loose wire connection can cause this problem which can then resonate the. Unusual ( he said it arc ’ d ), but i will.... Worries me, but any thoughts here your thermostat with, but just out. This problem too solenoid or reversing valve is not shifting then you might have a YouTube video made Supercool! Set on “ Cool ” the reversing valve coil and testing the capacitor that valve! I heard a sound like a motor trying to stop company… he said it arc ’ d ) but... Surging like it had air in the attic and go outside the the pipes and it started making funny.

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