I took the coil off the plunger of the solenoid. 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. The company fixed to run in air conditioning and said the reverse valve needs to be replaced for heat in the winter. Below we have a YouTube video made by Supercool Slide Rule which shows how to test a reversing valve coil. We have a 5 ton Carrier which is 3 yrs old and the decompression type sound lasts just a few seconds. I have never experience a load grrawling noise like this. Hope you have a nice day! Not all heat pumps are made the same when it comes to how much noise they make. 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. How do they do this? I would like to suggest having the capacitor checked to make sure it is in good shape. I am sorry to hear that you are having this noisy heat pump problem! Prevention Is the Best Policy. I hope you can easily find and fix the problem. Make sure you do not dent the valve because a dent will make the reversing valve stick even more. Sorry that I can not give you any other guesses. (n.d.). Thanks for this informative video! Starting lone then a creshendo to a higher tone that lasted about 20 seconds. 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. Even when the thermostat is not calling for cooling the reversing valve between “O” and “C” should be energized with 24 volts AC. If you ever experience a problem with any of your orders, contact us right away and we will make it right. $19.50 $ 19. Make sure that there is an electric power to the unit. Use the Goodman heat pump troubleshooting guides below. I would suggest having the pressures and super heat checked out if this continues. Menu. I have heard some of the units make some pretty load sounds when going into defrost. In the winter, in the middle of the night, the unit outside will make a loud decompression/discharge sound, almost like firing a torpedo. Most of the time contactors fail prematurely because the contactor coil is not receiving a minumum of 24 volts. Steve, Your email address will not be published. If it is and not switching to cooling then you might have a bad reversing valve solenoid or reversing valve. 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). Steve. Our email is. 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. So you could have a reversing valve solenoid coil that is bad or a thermostat on your wall might not be energizing the reversing valve in the heating mode. They I have a Carrier 30 (I think that means a 3 ton) anyway. I heard a sound like a water pipe in the wall thumping. But a defective heat pump reversing valve can limp along quietly sabotaging the whole system for a long time. Also, the strange thing is that I haven’t notice the this noise until recently with our 7 or 8 years old Carrier system. I recommend turning heat pumps to straight aux heat (emergency heat) when the temps are below 20 degrees outside for long periods of time (1 or more days). I am also sorry, that I really have no idea why and where the noise is coming from other than maybe the compressor vibration is traveling through your refrigeration line set and into the walls of your home. Mr. Peachy® Lv 7. 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. 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. If it works correctly and doesn’t make any noise, then very likely it is a reversing valve issue. When running or not…. I hope this helps you out. I am going to call another tech and worries me, but any thoughts here. The the contactor failed within a month. I would tell the HVAC repair tech about your noise. During the winter, whenever the heat pump goes into the defrost mode, this valve shifts. When outdoor temps are above 20 then turn the heat pump back on off aux (emergency heat). Best of luck in finding the problem. Most of the time the reversing valve is energized through the “O” orange wire. loud enough to wake us up. When a heat pump goes into defrost the reversing valve will shift into cooling mode so the outdoor unit will be defrosted. What gives? Our email is. You might have a slight short in one of the old thermostat wires which is robbing power to the contactor and other controls. 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. By: V. V. Solomon Mgr. 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. With the help of a component called a reversing valve. 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. 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. 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. The sound the unit makes with a blown valve on the compressor and a stuck reversing valve are real similar. 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. My reversing valve is extremely loud, like a horn…. Then noticed low pressure (large tube) was extremely hot at evaporator coil. I would like to suggest that you test your thermostat between the “O” and “C” wires with the thermostat set to cool. I thought my unit was bad because of the noise it was making but your video sounded the same way. So if you have your thermostat set on “Cool” the reversing valve coil should be energized. What I want to know, is it possible that the valve is stuck half way…. Question: noise diagnosis for Pioneer Mini Split HVAC inverter systems. I have had heat pump customers call me saying it looks like their outdoor unit is on fire when actually this is normal. 1 decade ago. any ideas? If it is cold enough outside you will probably see smoke (moisture) raising above the outdoor unit. You are welcome to send a phone video to our email address. However, if your heat pump does not thaw the ice buildup, it may be an indication that something isn’t working properly. It seems to be heating and cooling ok. Any ideas of what might be the cause? 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. Any reason why this new contactor failed so quickly? Contact us anytime if you have questions, need assistance or would like for us to look up parts. Reversing Valves on Heat Pumps Definition, Location, Function, Repair. Heat pumps do make strange loud noises especially in the wintertime. 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. Steve. Your email address will not be published. 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. Steve. Make sure you do not dent the valve because a dent will make the reversing valve stick even more. Not a squeak or rattle or gurgle, but a one-time bwwwuuuusshhhh. God bless you and your family today and always. The circuit breaker did not trip off. If you don’t know if it’s supposed to be out or in… how can I find out these things? It is supposed to be 95 here today in Louisville, KY. God bless you and your family. I have a heat pump system and recently my contactor went, I replaced it immediately and the new one lasted for a week. 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. 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. We offer same-day shipping on most products, so you won’t have to do without the goods you need for long. Required fields are marked *. Question: Hi, thank you. This occurs every time the unit goes into the “defrost cycle”. Is this worth calling our HVAC people out? Thanks Steve for making this video. Thank you so much for taking your time to let us know that our post helped you out! Whether you need furnace ignitors, AprilAire filters, EZ Flex filters, or another kind of HVAC merchandise, we want to serve you. Managed by Wooassist - Woocommerce Support www.wooassist.com. If not then you might have a bad thermostat. 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. The valve directs the flow off hot gas coming off the compressor based on if the space is calling for cooling or heating. The sound could be a minor problem like a loose screw. 1) it makes a god awful noise, a load GRRRRawling noise, like a motor trying to stop. We carry a huge range of brand name items that can be purchased online. Our email address is arnoldservice@gmail.com I hope you have a great day! If you are getting 24 volts between O and C then go and test the orange and c (com) wires outside at the unit and see if you are getting 24 volts between O and C. If you are then go to the reversing valve solenoid and see if the solenoid is getting the 24 volts. Seems to work fine. When a heat pump goes into defrost the reversing valve will shift into cooling mode so the outdoor unit will be defrosted. Thank you SO MUCH, Andrew, for the tutorial on weird heat pump sounds! Hydraulic hammering can occur with abrupt impedance (a valve closes) to non-compressible fluid flow (liquid). Hi, Thank you so much for the video explaining clearly how the heat pump works. A noisy loud heat pump or air conditioner unit can be an annoyance especially when sleeping or watching TV. 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