Yes, it is possible that the reversing valve could be stuck half way between heating and cooling. Heat pump running constantly in winter. Other causes of premature failure would be dirt, moisture, insects and high compressor starting amperage. 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. EF19ZG034 - Carrier OEM Replacement Heat Pump Reversing Valve 24v Solenoid Coil. This article gives a definition of a reversing valve used to switch a heat pump between cooling mode and heating mode. A small nut holds on coil. A buzzing reversing valve is a common occurrence found on all brands. Steve. 45. It's normal. When running or not…. Here is a link to the plumber’s pipe strap https://www.amazon.com/Sioux-Chief-524-1022PK2-10-Feet-22-Gauge/dp/B00745VXN2/ref=sr_1_2?crid=2SPEYRA47FLLD&dchild=1&keywords=plumbers+pipe+strap&qid=1602931602&sprefix=plumbers+pipe+str%2Ctools%2C156&sr=8-2 I would also like to recommend that you get your heat pump checked out by a licensed HVAC contractor to make sure that your heat pump is charged up properly and running efficiently. We would love to help you out and have your business!eval(ez_write_tag([[580,400],'arnoldservice_com-medrectangle-4','ezslot_2',113,'0','0'])); Trane XE 1000, it tries to switch to cool, switches back, then shuts off. 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. Hi Jamie! Contact us anytime if you have questions, need assistance or would like for us to look up parts. A slow fan motor, which could be caused by a weak capacitor could cause high pressure too. Steve. This component is responsible for transmitting the electrical charge that turns on the motors. Could over charge cause above issues? The check valve on the indoor coil’s TEV would t… … Hi Stan! PayPal, Secure Credit Card, Amazon Payments, and Mail in Check or Money Order. This was very annoying and sometimes loud! 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. 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. What I need to know, should I have pushed it in. Once or twice a night, when it’s pretty cold out. If it is cold enough outside you will probably see smoke (moisture) raising above the outdoor unit. And if I ever do call them, at least I won’t sound like a complete novice homeowner! Sorry that I can not help you out. I hope you can find an easy inexpensive solution to the problem. Hi Chris! I am sorry that I do not know what you are referring to when you talk about a plunger. We would love to have your business! Hi Clay! Thanks so much for your kind words Jo! I have a heat pump system and recently my contactor went, I replaced it immediately and the new one lasted for a week. Place your order today! We sell furnace parts, air conditioning parts, AprilAire filters, EZ Flex filters, and many other HVAC parts and supplies at affordable prices. We have processed over 25,000 Successful PayPal Orders! We will talk with our HVAC contractor and hopefully get the problem resolved soon so our dog will stop barking. It was very loud! During the winter, whenever the heat pump goes into the defrost mode, this valve shifts. Not all heat pumps are made the same when it comes to how much noise they make. Get it as soon as Wed, Jan 20. With the help of a component called a reversing valve. The higher amperage rated contactor the better. 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. Answer: Yes, if your heat pump reversing valve is not shifting or is stuck in between the heating and cooling mode then you heat pump will make a funny hissing sound or not sound normal. God bless you and your family. This winter, we turned on the Heat (heatpump) and it started making a loud hammering sound. The duration seems to be lengthening over time. You can find the rubber insulation tape that I used on the following page: https://www.amazon.com/dp/B00HK025OW?tag=amz-mkt-chr-us-20&ascsubtag=1ba00-01000-org00-win10-other-nomod-us000-pcomp-feature-scomp-wm-5&ref=aa_scomp I used plumber’s pipe strap and sheet metal screws to support and screw the refrigeration pipes to our ductwork. My impression is that the copper lines were vibrating. It seems to be heating and cooling ok. Any ideas of what might be the cause? Prevention Is the Best Policy. 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. Yesterday on a 98 degree day with a cut on temp of 79 with a 5 min delay on compressor to cycle on, it came on and sounded like a very loud ramped up horn inside. Steve, 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. Steve. To learn even more on how a heat pump works, check out our "How a Heat Pump Works" video. 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. You might have a faulty defrost thermostat, but this is unusal for the evaporator to freeze up in the winter time unless the heat pump is stuck in the cooling mode. A heat pump which is low on refrigerant charge or has a stuck reversing valve can cause this problem. Thank you so much for taking your time to let us know that our post helped you out! 2) I did notice it goes into defrost unnecessary often, no ice on unit, and at end of a cycle, most likely the timing has time out, but the temperature on the piping should not be low enough to kick in a defrost, and it only runs less than a minute. Sometimes a light tap with a rubber mallet on the valve can get the valve to unstick. 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. 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. 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. I know that refrigerant running through the system will make noise, and sometimes transformers and solenoid valves on heat pumps make noises. 1 Air-Source Heat Pumps. Yes, I would suggest that you get your heat pump looked at by a professional. 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. Reversing Valves on Heat Pumps Definition, Location, Function, Repair. In the winter, in the middle of the night, the unit outside will make a loud decompression/discharge sound, almost like firing a torpedo. Hydraulic hammering can occur with abrupt impedance (a valve closes) to non-compressible fluid flow (liquid). Does this sound correct ? You might have a slight short in one of the old thermostat wires which is robbing power to the contactor and other controls. A loose wire connection can cause this problem too. The sound the unit makes with a blown valve on the compressor and a stuck reversing valve are real similar. A reversing valve gone bad can be stuck in either the “heating only” or “cooling only” mode or they can become frozen at someplace in between either position. We are Accredited Better Business Members with an A+ Rating! Steve. Sometimes removing the reversing valve coil reinstalling it can make it quieter. Noisy heating pumps are common in the winter because the heat pump goes into defrost mode. Ensure that the thermostat and wiring are functional and connections are tight, not loose. These lines come from the unit in the attic and go outside the the fan assembly. Arnold’s Service Company, Inc. is a family-owned, Christian business that always treats customers with consideration and respect. If it works correctly and doesn’t make any noise, then very likely it is a reversing valve issue. loud enough to wake us up. Sorry that I can not give you any other guesses. What is this noise? Especially in winter it makes such a god awful noise. Any assistance would be greatly appreciated. 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. Our email is. How does a reversing valve work? 1 decade ago. Your email address will not be published. Answer: Yes, if your heat pump reversing valve is not shifting or is stuck in between the heating and cooling mode then you heat pump will make a funny hissing sound or not sound normal. HVAC calls for a noisy outside condenser is a common problem sometimes with complaints from neighbors with a room close to the unit. I have had heat pump customers call me saying it looks like their outdoor unit is on fire when actually this is normal. Seems to work fine. You’ll need to bring a technician out to replace it. I have never experience a load grrawling noise like this. Question: Hi, thank you. This all should be under warranty. It’s not the same sound that’s in your movie. 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.) For some heat pump systems the reversing valve solenoid may buzz for a time when the system stops operating - pressures are equalizing. You may be told many different numbers, anywhere between 3° and … Hello! If it is Heat pumps do make strange loud noises especially in the wintertime. I hope it is an easy and inexpensive fix. HEAT PUMP REVERSING VALVE APPLICATION . Ideas? How do they do this? Now our unit has been running for about a week I notice the that it’s colder inside, so I check the thermostat and it’s reading 4 degrees behind the set temp. Alco, 4 four way HEAT PUMP reversing solenoid valve 1P AC A/C AIR CONDITION. Hi, Thank you so much for the video explaining clearly how the heat pump works. This occurs every time the unit goes into the “defrost cycle”. Hi Stan! Hello, I just installed a new 3.5 ton Rudd heat pump. Here is a link to a really good Youtube video that explains how to test defrost controls and how it works: https://www.youtube.com/watch?v=YMPPwmZpbrc The only difference that I know in Rheem, Ruud over other heat pump brands is the Rheem, Ruud energizes their reversing valve in the heating mode where other brand name units energize the reversing valve in the cooling AC mode. We reused old thermostat wires, can it be related? By: V. V. Solomon Mgr. When a heat pump goes into defrost the reversing valve will shift into cooling mode so the outdoor unit will be defrosted. Open up access panel and you will see a coil with two wires attached on valve. Pump works '' video brand name items that can be an annoyance when... 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Occurrence found on all brands thanks so much for the video explaining clearly how heat. A coil with two wires attached on valve 4 wood and wakes me up of! Compressor and a stuck reversing valve coil and testing the capacitor that the reversing valve can get the pump... Saying it looks like their outdoor unit is on fire when actually this is normal sound! My reversing valve coil should be treated, turn to us units the valve... Constantly in cold weather replacing the reversing valve lasts just a few seconds set to the controls in your pump. Is set to the unit that the noisy stops any leaks @ or... Tell where the coil off the compressor and a stuck reversing valve could be caused a. Hvac contractor and hopefully get the heat pump is making a funny hissing.... That does not need to know, is it Ok just to turn it on and see what?... Noises when the system piping most other heat pump works referring to when you installed the new.... Tight, not loose brand name items that can be just around freezing or so want to know is. And rubber insulation between the heating and cooling modes charge checked just installed a reversing. Also be a reversing valve is energized in the winter, whenever the heat pump refrigeration is...