A new 3 ton Carrier AC unit was installed in our newly constructed home in October. The first summer and every summer since the exchange core freezes over if the thermostat is set below 83 degrees. We live in central ohio and summers are pretty mild. The unit should be able to handle this easily. Each summer our repair tech recharges the unit and it gets a little better for a period of time, but we really have to baby the settings. This summer the tech said the issue is a bad TXV valve and that we need to have it replaced. The manufacturer has been zero help and basically throws everything back on the contractor - "we only manufacture them, we do not install them". We are now told that our 5 year parts warranty is void since we only had the unit serviced one time annually instead of two times - would have been nice to know! I am not surprised by all of the negative posts relating to Carriers poor quality and hideous product support. With a $500 repair bill looming, I will be pricing a new Lennox unit for replacement of the Carrier unit. Do not buy carrier products!
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