Ac Coil Cleaner Should A 3 Yo AC Unit Require Extensive Coil Cleaning If It Was Properly Installed Initially?

Should a 3 yo AC unit require extensive coil cleaning if it was properly installed initially? - ac coil cleaner

I live in PHX, AZ hot (). I had a new heat pump heat for the 05 October regarding the source of the Guarantee Corporation and mechanics set. Since then, recognize that they have no professional maintenance had done it. The system is locked / froze last week due to dirty coils,