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Our "New" York heat pump is making a loud moaning noise when shutting off. The weather has been around 27 degrees at night. Is this normal. It wakes us up during the night.

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6ya6ya
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Posted on Jan 02, 2017

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  • 274 Answers

SOURCE: Loud as Hell

Is it installed in a window? Check to make sure it is installed correctly. usually there is a felt or foam strip that is used to dampen vibration when you place it in the window. It also acts as seal to keep outside air and bugs out. If you place your hand at various locations on the unit does the sound go away? If it does then you know it is a vibration problem. Just add new foam or re-adjust the foam or gasketing it already has. If that doesn't work then try to locate the source of the noise. Use a mechanics stethoscope or even a cardboard tube from paper towels will work. Once you have located the source then you can tell the store what the problem is when you take it back and get a new one. Cheap air conditioners are noisy. Some more than others, it's why they are cheap. But your problem does sound like it could be a product issue.

Posted on Sep 25, 2007

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pierre1811
  • 144 Answers

SOURCE: Heat pump is humming loud>

When the heat is not on. Go to the T-stat and turn the fan to the on position. With the blower now running is it making the noise? If so you probably either have something in there such as the filter that was mentioned, a piece of paper etc. or one or more of the blades on the blower wheel is vibrating. Don't let the condition persist w/o having it checked out or you may turn a simple fix into a costly one.

Posted on Jan 22, 2009

mrgrzz
  • 88 Answers

SOURCE: New 14 seer split ruud heat pump makes very loud knocking noise

Well you may want to have a tech come out and check the freon level, but mostly when going into defrost, some units make alot of noise, the freon is reversed in the unit by way of the reversing valve, it makes a whooshing sound like freon is draining off, as far as the knocking noise, could be as I said in the beginning, might be low on freon, but it could be that, this particular unit does this, I have had units make some really strange noises in the past but functioned perfectly, hope this helped, please let us know, thanks again,
mr.grzz

Posted on Jan 24, 2009

  • 3 Answers

SOURCE: fujitsu heat pump noise

i would check the blades on the condenser fan motor and make sure they are not hitting anything if they are not, spin the fan see if the fan spin freely, it should, if it doesn't it could be the bearing in the motor are dry and going bad

Posted on Jan 24, 2009

james3751
  • 614 Answers

SOURCE: RUUD 14 seer heat pump makes loud squeeking noise after cycling.

Your problem is the TXV. I just had person with the same problem. Replace TXV no problem Rusty

Posted on Jun 05, 2009

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My bryant heat pump installed in 2008 makes a loud squealing / moaning sound during heat mode,it is a 3 ton,i keep it 66 degrees tring to save money my bill was still 196.00,it goes in to emergency heat...


Sounds like a normal defrost cycle. Watch it next time it does it. The outside fan stops, there will be a 'swishing sound'. That is the reversing valve changing over. Then you may see some water vapor rising up fromt he condenser, the emergency heat light illuminates on the thermostat. All of this is normal. The colder it is- the more you will notice it. Some heat pumps ARE louder than others during the defrost cycle. Have your a/c man check the charge ont he system just to make sure, though.

Other than that - let it run. You should have at least a 5 if not 10 year parts warranty.

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Your problem is the TXV. I just had person with the same problem. Replace TXV no problem Rusty

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Heat pump is humming loud>


When the heat is not on. Go to the T-stat and turn the fan to the on position. With the blower now running is it making the noise? If so you probably either have something in there such as the filter that was mentioned, a piece of paper etc. or one or more of the blades on the blower wheel is vibrating. Don't let the condition persist w/o having it checked out or you may turn a simple fix into a costly one.

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My heat pump starts up in the defrost cycle.


My question may seem a little ignorant but How do you know your heat pump starts in defrost? You can't tell by "feel". You have to measure heat with a thermometer. If its because it "feels cold" your body temp is normally 98.6'f if your heat pump is in cold air outside (say below 40 or 45'f) and its putting out 85 to 98'f air inside your home is gaining even if it feels cold to you. Hearing the reversing valve kick in or out? Just because you hear this doesn't mean its in defrost, it may normally start this way.

Now if its running for a long time? That's subject to your interpretation of long time. It could be normal too especially if the air outside is getting colder and your house is needing more heat to keep it comfortable for you. The longer the heat pump runs means the more electric it is saving you.

The one thing that makes me believe this is all normal is the fact you say the elements kick on and warm up the home before it shuts off. So heres one way to kind of tell where your at:
1 Are the filters cean?
2 When the weather warms up does the Heat pump run as long?
3 Does *** run longer as the night gets colder?
4 Does it defrost at times and you see steam coming off the out door part and the out door fan stop?
5 does it make a swishing noise just before it defrosts and maybe after it defrost?
6 does it make ice build up around the base if its been running for a few days?
7 does the air comming out the ducts test at least 5 to 8'f warmer or more, than the room temperature?

If all of these are yes then most likely you have a normal operation going on.

If the elements are coming on that usually means the heat pump cant handle the load by itself. Remember this :
It uses less electricity to run the fan motors and the compressor < 18 amps in cold weather. Typically with everything clean heating output on a 5 ton somewhere around 50,000BTUH [a 3 ton will put out around 28,000 btuh and only pull about 12 amps] you would have the indoor fan motor running any way with either of the heating systems so it isnt needed to count for effiency.
1 heating element 5KW at 240V about 20.83 Amps and it puts out only around 17,000 Btuh. But the heating element glowes red hot and consentrates heat in a shorter time thus it "feels" warmer, which it is but its not cheaper.

If this help\ed you understand your heat pump operation and you feel like it is normal now please rate me as high as you can. If you feel you you may still ahve a problem please post it and the answers to the questions above as to narrow your scope of what to look for. Thanks for using fixya and good luck.

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