A/c not working. Nothing turns on


  #1  
Old 06-21-21, 07:41 AM
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A/c not working. Nothing turns on

We have 2 zone a/c and one is not working at all. No outside compressor or outside fan and no inside fan is blowing either. I reset both breakers, but nothing happened. I tried turning breaker on by outside unit to see if it went on and off and tried starting fan manually. Still nothing. My next move is going into the attic to check up there. Just not sure what to look for. This site helped years ago and helped diagnose needing a start capacitor. I tried running just the fan manually on the thermostat but still nothing.
I will report back the model number after waking up my son so I can go into the attic through his room. With the air handler be 220 V also I know this seems to 220 circuit?
 
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Old 06-21-21, 08:03 AM
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Indoor unit will either be 115V or 208/230V, depending on the equipment.
Start by checking the low voltage transformer and fuse/breaker.
 
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Old 06-21-21, 08:40 AM
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Quick update. I did not know there were 2 breakers for each and the second one was tripped which I reset. Now the air handler works but still no compressor. I tried spinning then turning it in both directions and the compressor does not kick on. I have a separate breaker by the compressor. It is an Armstrong scu 12e24a-4 and also says concept 1200.
 
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Old 06-21-21, 09:21 AM
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Which breaker was tripped? The one for the condenser or the one for the air handler?
Check for power at the condenser.
 
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Old 06-21-21, 09:37 AM
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Air handler fuse was tripped. After resetting, the air handler works fine on manual.The air handler also kicks on when I turn down the thermostat.
nothing from the condenser. Maybe the outside secondary fuse box may be blown? I don’t have a 240volt meter.
 
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Old 06-21-21, 09:57 AM
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You can see if the contactor is pulled in.
But you’d really need a meter to see if the condenser has power.
 
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Old 06-23-21, 02:58 PM
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Thank you so much. I tested the power and found the outside cutoff circuit breaker was defective. I replaced it and all is great.
 
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Old 06-23-21, 03:39 PM
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An awful lot of breaker issues there. That's pretty uncommon.
 
 

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