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Hello, tell me when exactly you hear the squealing noise and for how many seconds, is it just after the compressor turns off, after it finishes a heating or cooling cycle? or is it all the time.
We can go from there.
Thanks, If it is not a fan noise, then it is either from the compressor or the 4 way valve mounted next to the compressor (about twice the size of a mans hand with 4 pipes attached).
You can buy a mechanics stethoscope for $25 or so at most Auto Parts stores, and use that to track down the source of the sound... or you use a screw driver and put the plastic handle against your ear.
Let me know what you can discover.
Hello again, so far we have just begun a much longer trouble shooting process, there is a very good chance that I can coach you through a diagnosis the might save you substantially on repairs or avoid the repairs entirely... some of these noises are common as a unit ages and do not necessarily cause any long term problem.
Good luck with what ever you wish to do however. On this end however I am willing to go on as long as it takes.
Hello again, the compressor has a metal tag welded to it, 3" x 6" or so, it is stamped with a bunch of numbers and the brand name of the compressor, very often either 'copeland' or 'techumseh' there is a lesser chance of some other brand,
Get me all the numbers on the plate and will look it up to what type of compressor it is, at age 16 it was built when both piston type and scroll type compressors were being built, a worn scroll would make a chirping noise... if that is the case however, there is nothing you can do about it, and it might last another 5 years that way.
Let me know, we can go from there,
That will work.