How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manfuactured and modular homes
What is causing the outdoor unit (condenser) of my air conditioner to shake?
Tuesday, June 19, 2018
Shaking and rattling of a heat pump or air conditioning condenser is usually caused by the fan mounted inside the top of the condenser when it becomes unbalanced. Even minor shivering of the unit should be repaired because it will reduce the life of the condenser and often works loose the screws holding the cabinet and internal components together over time, which makes the shaking worse. It is also possible, but less likely, that a loose or broken mount at the compressor in the bottom of the condenser unit is the problem. A severely unbalanced fan blade will come apart inside the condenser and can damage the internal components and condenser coils that encircle it.
And, finally, minor noise could also be caused by a loose panel of the cabinet of the condenser. Try pressing in lightly on the panels to see if it makes the sound stop, and then tighten mounting screws as necessary.
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To learn more about heating and air conditioning systems, see these other blog posts:
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