Heat Pump: replace compressor or get new sys? - http://www.hvacmechanic.com/ Forums

Original message

TonyXL

163.252.14.191

"Heat Pump: replace compressor or get new sys?" , posted Mon 12 May 09:32

On my 10 year old Carrier heat pump, the outside unit is rattling. First tech said it was the fan motor ($700 parts and labor). Second tech brought the fan out but the rattle remained. Put old fan back and said it was actually the compressor ($2200 parts and labor).

First question: If I replace the compressor, can I get 5 more years out of the system? Never had any problems with the rest of the system (indoor or outdoor).

Second question: For a complete new system (seems to be $5000-$6000) is it worth paying $500 more for an R-410 based system over an R-22 system?

Third question: Does Kenmore make a quality heat pump? Sears rep said it uses same main components as Carrier. Or should I stick with Carrier/Trane?

Thanks everyone!
-Tony

Replies:

Freon

72.155.48.172

"Re(1):Heat Pump: replace compressor or get ne" , posted Mon 12 May 10:55:

Be certain the rattling is from the compressor. They usually don't rattle unless a mounting grommet has worn out however the copper tubing for the condenser coil can rattle if it's touching something it shouldn't. You can try and lift different corners of the condenser up to ~1/2 inch and see if that affects the rattle. If it does, then it's very likely tubing that's the cause.

[this message was edited by Freon on Mon 12 May 10:56]

TonyXL

163.252.14.191

"Re(2):Heat Pump: replace compressor or get ne" , posted Mon 12 May 11:09

Thanks for the tip, I'll give it a try.

So is it at all possible for the compressor to rattle "on it's own"?

Incidentally, performance-wise the unit is running great.

Freon

72.155.48.172

"Re(3):Heat Pump: replace compressor or get ne" , posted Mon 12 May 20:04

Anything is possible. But if the system is working fine, then it seems less likely it's the compressor. Vibrating pieces within the condenser can cause rattles. Something wrong within a hermetically sealed compressor I would not expect to rattle. The type of compressor (reciprocating or scroll) might make a difference. But I am not a pro so doubt what I say.