What is wrong when the Ruud A/C blower in the attic starts making a loud whmmmmp noice sounding like a noisy dry thump, thump when it is running? This only recently started. Unit is the Achiever Series UANL 049JAZ (R410A) mfg 07/2010. Both a/c an heat was checked out last year and was functioning just fine.
This noise is causing me to not to use my A/C and it is getting hot.
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