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3 year old central air unit will not run only inside blower fan goes on Circuit breaker is ok outdoor switch is on thermostat to cool and lowered indoor tempPossible causes?
Wiki User
∙ 14y ago
Just to confirm: with central air conditioning, there are typically 2 circuit breakers: one for the inside blower unit (which is obviously working), and one breaker set for the outdoor unit. It's this second "double breaker" I'd look at first. Often, breakers trip and don't look like they're tripped. The only way to check for sure is to switch the breaker off, looking for a solid "click," and then turning it back on again. If nothing still runs outside, the possible culprits are as follows:
1. If the "condensate" -- the moisture removed at the indoor evaporator coil -- is routed to a "condensate pump," it may be that that pump's sump is full. Is the condensate pump energized? Does it have a "safety switch" that shuts off the air conditioner if the sump fills up? If the pump's sump is full, and there's power to the pump, then the condensate pump may need to be replaced.
2. Burnt/broken power or control wiring to the outdoor unit.
3. Burnt/broken contactor in the outdoor unit.
4. Deluxe outdoor unit senses a loss of refrigerant and shuts itself off (via the "low pressure safety" control).
5. Failed outdoor fan motor has overheated the compressor, so neither runs.
6. Failed compressor (due to internal failure or problems in the start components or burnt/broken wiring at the compressor terminals) keeping the compressor off. The condenser fan motor is kept off by a "condenser fan cycling control" which normally starts it after the compressor has built up refrigerant pressure.
Wiki User
∙ 14y ago
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60amp
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can a faluty thermostat affect your central ac working?
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a disconnect? if its a switch, turn it all the way off... then all the way on. if it pulls out and has fuses then be sure they work and stick it back in. or it could be that the breaker inside has been tripped. then you would turn it off then on.
How do you reset your central air unit?
There is no reset button on a central air unit, there is a small breaker or fuse box outside next to the unit, it is possible the fuse is blown or breaker tripped.
What temperature is your central heating thermostat set at?
72
Why would the central air not come on when turned on at the thermostat?
eihter the thermostat is messed up or you have a short in the wiring.
Where is central air fan relay switch?
The switch is on your thermostat.
Where is the breaker on your central air conditioner?
It should be located "an arms reach" from your condenser.
What is wrong if your home central air conditioner runs about 20 minutes then throws the breaker in the main control panel?
The circuit breaker might of lower ampere rating. its obviously broken ring for an engineer Could be a few things: faulty start compenents, shorted compressor, faulty condenser fan. Not a good idea to run it until you get it looked at.
My central air conditioner does not blow cold air and the unit outside and is not running?
The problem is probably outside. Can`t tell you much more than that from here. The condenser unit outside was not running. I checked the circuit breaker box and found the 220 breaker had been switched off. Turned it back on and now it's running and I'm getting cool air.
