Air Conditioning - Compressor cycles off with a hard thump

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Learning2
11-21-06, 11:10 AM
I recently had to replace my air handler with a new 13 SEER Trane air handler. The compressor is a 4 year old Trane XR11. When the compressor cycles off it does so with a harsh thump - almost like it seized up or shut off under pressure. This was not the case before the new air handler was installed. They did install a hard start kit on the XR11.

It is not a smooth shut off like the other Trane XR11 compressor I have that is linked to a Janitrol air handlerWith the old air handler.

Is this hardsh shut off damaging the compressor?

Thanks.

Ed Imeduc
11-21-06, 11:49 AM
That new blower coil could have a TXV in it and the new ones are not the bleeder type
SuperTyphoon
11-21-06, 03:28 PM
My 3 year old school classrooms have wall mounted units with ducts, and when they turn off the compressor makes a very loud thud. It's to prevent leaks or something...