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My power went out and when it came back on my central air doesn't blow cold air. Could a surge damage my central unit?

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Could have blown a fuse or the thermostat may need to be reset .

Posted on Oct 05, 2009

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I got Nuttin'


The point of the fuse is that it blows before a surge can damage anything past it. If there's a component that could be damaged with a 3 amp surge for example, the 2.5 amp fuse would blow before the surge gets there but the 3.15 would let it through, and damage would be done.

Jan 26, 2014 | Peavey PVi 4B 4 Channel 100-Watt Powered...

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Central air conditioner unit comprssor doesn't come on i suspect a lightening storm did something while we were away


check main power breaker, and reset breaker on unit, otherwise lightning storm would have nothing to do with units problem other then power surge, which would trip a breaker. Hope this helps, Thanks Mikemc1bean.jpeg

Jun 23, 2011 | LG Heat cool Window Air Conditioner

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Unless we set the thermostat very high, like 80 degrees, the heater will blow cold air. When the heat does blow, it will eventually stop blowing heat and the fan will continue to blow cold air.


Check and make sure the filter is clean. This sounds like a restriction in the system. If the unit has central cooling make sure ther indoor evaporator coil is clean at the furance.The unit may be cycling the burners on and off at the high heat limit , fan/limit control. You can also eliminate the thermostst from the furance. Turn power off at the furnace and disconnect the wiring from the thermostat. Jumper the red and white wire together. Turn the furnace back on. The furance should run in the heating mode. Try this and see if the problem is still there.

Jan 25, 2011 | Heating & Cooling

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My central air conditioner was working fine but the power went out for about 2 hours and when it came back on, my air pump runs and the air conditioner fan is running but it blows warm air. What gives?


mcdevito75 here, Your A/C units control board is most likely transisterized or computer built, in which case when power went out so did the memory in your A/C control board. Simply shut down your A/C unit, re-start and make adjustments again for your comfort.

Aug 19, 2010 | Heating & Cooling

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Central air conditioning system is blowing warm air.


many, many. Is the outside unit running? If it is, is the compressor running? Feel the refrigerant lines leaving the unit. Little one should be warm. Big one should be cold, probably sweating.

Jul 08, 2010 | Ruud UAPA042 Air Conditioner

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I have a central heating and air unit. The unit


sunds like the fan bearings have seized up or u have a bad fan capacitor take a screwdriver and spin ith blade to where the air would be coming out the top and if it startswhen u spin it u need a fan capacitor

Feb 23, 2010 | Coleman Propane Forced Air Heater...

1 Answer

After power outage, fridge does not work but freezer does


Sounds like a thermostat got damaged when the power surged when utilities were restored. Thermostats are usually behind the temperature controller. Hope I've helped. BB

Jan 20, 2010 | GE Refrigerators

1 Answer

Central air system blows cool air not cold and


your indoor unit is only circulating the air in the house. for your condensing unit. check your breaker in the electric panel. your contactor or your capacitor.

Aug 09, 2009 | Carrier Heating & Cooling

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Anytime we have a power surge the a/c unit stops blowing cold. I have to shut the a/c unit off and turn it back on after a while to reset it.


overload protection/surge protection. Makes sense so gotta live with it. Unless you can stop the surging. Tell you power company about it and they will help you

Jul 19, 2009 | Heating & Cooling

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