How to Fix A Loud Noisy Heat Pump Unit

By | October 12, 2015


A noisy loud heat pump can be a annoyance especially when sleeping or watching TV.
 
Not all heat pump are made the same when it comes to how much noise they make.
 
Some are so quiet you don’t even know it has turned on while others can force you to turn the volume up on the TV.
 
Before racing out to buy a new heat pump let’s look at something’s a home owner can do to quiet down a noisy unit.
 
What Is the Noise Source?
While many things can make a heat pump noisy the main culprits are the moving components such as the fan motors and compressor.
 
The Compressor
A compressor is what moves refrigerant though a unit and moves hot and cold in or out.
 
Often they can become loud either because they were manufactured that way or are old and starting to show wear.
 
Compressor Sound Blanket Wraps can be used to muffle out a noisy compressor and can be quite effective.
 
A compressor sound wrap blanket is made of noise reduction material that simply wraps around a compressor.
How to fix a Loud Heat Pump Unit Compressor
 
Sound wraps are simple enough to install with minimal skills and can even be bought on Amazon.
 
Compressor Sound Wrap Blanket on Amazon
Brinmar SBUHD Universal-Fit Air Conditioner Compressor Sound Blanket Wrap (#0421A)

 
Manufacturers dont usually install a noise suppressant blanket around a compressor but some do so be sure to check.
 
Installation is not hard but does require unscrewing and removing the top or side panel of a heat pump unit which may not be for everyone.
 
Someone can always be hired if need. If you do install one yourself be sure the power is off to the units before removing the top or side panel.
 
 
Vibration Isolation Dampener Mounts
Some compressors vibrate badly which makes them very noisy as the vibrate about.
 
One way to fix this problems is with Vibration Isolation Dampener Mounts which are a cheap and easy solution.
How to fix a Loud Heat Pump Unit
 
Most compressors have 3-4 main bolts that hold them in place. Vibration dampener replace these bolts with a layer of hard rubber that absorbs the shock created when the compressor vibrates.
 
Here Are Examples On Amazon
JW Winco 451.1-25-25-5/16-55 Series GN 451.1 Rubber Cylindrical Vibration Isolation Mount with 2 Threaded Studs, Inch Size, 1″ Diameter, 1″ Height, 5/16-18 Thread

 
They do require removing the old mount bolts and replacing them with the new ones.
 
 
Condensing Fan and Blower Motors
A condensing fan and blower motors are what blow air away form a unit and blow air into a home.
 
The condensing fan motor is the motor that sits outside and blows a large fan. This is the most common of the two to go bad in a heat pump unit.
 
Often they are simply worn with age and time to replace. Other times the fan can be damaged causing it to wobble wrong.
 
Check for any debris that the fan may be hitting when it spins and that it is aligned properly. If the holding screws become loose a fan motor can touch metal and make a racket.
 
Changing out a condensing fan motor is more complicated than the other options but can be done by someone with basic electrical skills.
 
For a complete write up on replacing a condensing fan motor click here.
 
 
 
 

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