Frozen coil, fan not running
Posted 20 June 2006 - 04:06 PM
been having some problems with my home a/c. i have come home 2 times to my house hot as hell and the air handler not blowing air but the unit outside is on. the evap is also frozen solid. this happened 2 times a month apart. i talked to a guy that was a repair man and he said it was probly a capacitor for the fan motor. wich made sense but it wasn't happening allot just those 2 times. well i was going to get around to replacing the capacators but today my power went out for a split second. immediatly i thought to myself that i should go check on the a/c cause it was running when the power went out. run outside and sure enough the condensor unit outside was running but the air handler fan wasn't and you could already see the coil starting to freeze in the air handler.
now my question, what could be causeing this? shouldn't the thermastate shut the the condenser unit off when the coil starts to freeze? could it be the thermastat is bad? it's a digital one if that matters.
every time this happens i have to cut the breaker off for the a/c for a few seconds and flip it back on and it all works fine again.
Posted 20 June 2006 - 04:24 PM
Posted 20 June 2006 - 04:57 PM
is there some sort of thermostat that i can buy that has a delay if the power goes out it will wait a few minutes to turn the unit's back on?
Posted 20 June 2006 - 05:45 PM
Posted 20 June 2006 - 05:50 PM
Edit. i know the unit's are made by Colman...lol.
Posted 20 June 2006 - 06:04 PM
Posted 20 June 2006 - 06:43 PM
Posted 25 June 2006 - 06:20 PM
Problem could be anywhere: T-stat, wire from t-stat to A/H, sticking relay in condening unit (not likely from what you said but still a possibility)
Most t-stats do not have short-cycle protection for power outages, it sems like it would make sense to include it. It is often built-in to the condenser, but not your unit.
Posted 28 June 2006 - 04:47 PM
the air handler not blowing air but the unit outside is on. the evap is also frozen solid.
Have you checked your air flow? Obstructed air return (like in filter), blower motor failing, collapsed duct work, or commonly a very dirty evaporator coil. My bet, and I'm sure service men will agree, a good cleaning the entire system will cure a high percentage of air conditioner problems. I seen one direct drive blower where the motor was running just fine, but the blower was only running about one-third the speed of the motor. The blower wheel hub had broken loose, but not completly.
Posted 29 June 2006 - 08:04 PM
how is it gonna know if yer outside unit is freezin up?
the problem is gonna be relateed to the inside blower unit not the condenser.
either the A-coil inside is dirty or the blower motor aint funtioning
I feel like the problem might be the relay
but i need more info
is your unit a a gas or electric heater?
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Posted 08 July 2006 - 07:51 AM
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