AC Unit Blowing Heat(not warm air, heat)


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Old 03-20-12, 11:04 AM
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AC Unit Blowing Heat(not warm air, heat)

I had a question, my AC quit working towards the end of last Summer and we need to get it going again. It actually started blowing heat WHILE the cool air was truned on, now I don't mean it was blowing warm air in from outside it was actually as if the heat had been turned on. Now I'm thinking it may be the thermostat because it's old and doesn't even read the in house temp any more but I wanted to get some other opinions.
P.S.
I'll also add that the coils are clean, the compressor runs and both lines are pressurized, however I will say when I turned the AC on just now to check it it quickly heated up to 120 degrees(the Big Line heated up I mean)
 
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Old 03-20-12, 11:13 AM
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Furnace might be running when ac is on. T'stat could be the cause of that.

Is this a straight cool unit or a Heat pump?
 
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Old 03-20-12, 11:27 AM
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Not Sure

I think it's straight cool? I know I have heat pump but I think it's inside the house next to the bathroom if that makes sense, if not how do you tell?
 
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Old 03-20-12, 11:35 AM
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I just check, I've definetly got two units, one inside and one out, the one inside has a thick grey/blue residue around the insulation close to where it bends into the unit, could this be a freon leak?
 
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Old 03-20-12, 02:58 PM
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please post the make and model number of your equipment and your thermostat.

the grey/blue is typically from copper pipe that has oxidized. Most likely not a sign of a leak.
 
 

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