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A/C unit is blowing cool air outside from the fan and hot air inside the house

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07-17-13, 11:42 AM

feffy

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A/C unit is blowing cool air outside from the fan and hot air inside the house

I try to be as handy as i can. I try to fix all i can. But i need a little direction in order to fix. My husband is currently in afgahnastan and useless.
I came home from a three day vacation to a house that was 98 degrees. THe unit was set at 75 it was switching on and off but when on was blowing hot air into the house. I turned it off let it cool and turned it back on no such luck. The fan is working and turning. the lines coming off the unit are both no change in temp after being ran for an hour.
any help would be greatful. I just changed the capacitor 6 months ago.

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07-17-13, 12:51 PM

HVACNewb

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"My husband is currently in afgahnastan and useless."

I'm trying to hold my tongue on this one...but just because he's oversees does not make him "useless"...while you're on a 3-day vacation. lol.

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07-17-13, 01:44 PM

Bob14525

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When you say the fan is running, do you mean the air handler (blower), or the condensor fan (fan at top of outside unit), or both? If the blower is running, but nothing is running on the outside unit (condensor fan or compressor), it could be the contactor (relay that turns outside unit on/off based on thermostat setting). There are usually two capacitors, one for the condensor fan and another for the compressor. Sometimes they are combined into a multiple capacitor unit. With a little more information, we can try to help you narrow it down a little.

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07-17-13, 01:50 PM

tomf63

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Is this a heat pump setup? If so it could be a stuck reversing valve.

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jamada77 on Jul 17, 2013

I live in Delaware and have a (Carrier Multi poise Oil Furnace model 58CMA my A/C unit is Carrier model 38TRA) I have my A/C set on auto it comes on cools down the house however once cooling temp has been reached and the unit shuts off it will not kick back on when the house temp goes above temp setting unless I use the reset switch located on the furnace.(pics attch) Also when it shuts off it sounds like water it still circulating however (THERE ARE NO WATER LEAKS ANYWHERE). Any help would be most appreciated [ATTACH]15253[/ATTACH][ATTACH]15254[/ATTACH]
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CalinJersey on Jul 17, 2013

Greetings All - we put in a new unit last summer - worked fine all summer and first month of 2013. Unit was serviced end of last season. 2 Days ago, outside fan stopped (inside fan continues to blow non-cold air). we checked the breakers (flipped back and forth); unit starts again - but only last between 10 minutes and an hour, maximum, of blowing cold air. what are possible issues? on the phone, people have told us it's electrical - not enough power, but why would it be fine last year? also, we added duct work so upstairs of our (small) cape cod-style home gets cool air - Does adding duct work create additional demand for electrical power? Would this cause increased demand on electric - and hence, cause the shut-off after an hour? Other guess we heard was that unit was maybe "Overheating" - aren't these units built to operate in the summer??? Unit we installed was intentionally large enough to eventually cool the upstairs. Many thanks.

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