How to Quiet a Heat Pump

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The noise of a heat pump's condenser unit can disrupt any outdoor function. If the unit is outside a bedroom window, it can disturb your sleep as the unit turns on and off throughout the night. On a city lot, the excessive noise may even bother your neighbors. Older heat pumps tend to create more noise than the newer versions, which have been specially designed for noise reduction. If you do not have the money to replace an older unit with a new one, you may wish to consider undertaking a few steps to lower the condenser's excessive noise.


The condensing unit of a heat pump creates noise when it runs.
Image Credit: Jupiterimages/ Images

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Things You'll Need

  • Shrubs

  • Fan

Step 1

Replace the fan in the heat pump's outdoor air condensing unit. Choose a model with a quiet motor that operates at a slow speed. Fans specially manufactured to help reduce noise have been developed for the retail market.

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Step 2

Inspect the fan grille to make sure it is securely attached to the unit. A loose fan grille will cause a clunking noise. Check to make sure all the screws and bolts are tight on the unit. Any loose part can cause excessive noise.

Step 3

Plant shrubs around the outside unit to help muffle the noise. The shrubs will help hide the unsightly unit and provide it with shade that can reduce energy costs. Allow ample room between the shrubs and the unit to provide adequate air circulation and to allow a repair technician to reach the unit.


If the ductwork of the unit makes a roaring noise, check it for possible leaks or holes. Animals inside the ductwork can cause damage.


If your heat pump makes a crackling or electrical noise, have it checked by a professional to determine if there is a dangerous electrical problem.


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