Question about Carrier 38CKC036 Air Conditioner

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Carrier air conditioner

I lost power to the unit. No circuit breakers were tripped. It is a hot day and it appeared the air conditioner wasn't cooling. The temperature on the control said 81 and the unit was set for 74 degrees. I tried moving the arrow up towards 81 degrees and as soon as it hit 81 with the indicator, all power shut off. I have no lights. How do I reset the A/C. I tried to reset the circuit breaker in my garage, but it did nothing. I also found a switch and circuit breaker in the closet where the unit is and it was indicating on and the circuit breaker does not appear to be blown. It is a Carrier heater/air conditioner. Do not know the model

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Re: Carrier air conditioner

Sounds like you either blew a transformer, have a bad circuit breaker or blew the main fuse in the outside disconnect. If the indoor unit is still blowing air (no matter what temperature) start looking at the power supply to the outdoor unit. From the circuit breaker, the power will go to a small box located within a few feet from the outside unit. This box will have either a lever on the side or you will be able to open the box and pull out the fuses. From this box the power goes to the condensor. The first thing you should do is to turn off the breaker to the outside unit. Flip it back on and if you have a call for cooling, after about 3 minutes the outdoor unit should start. If it does not, shut off power again to the unit by switching off the breaker, go outside and pull out the fuses in the disconnect box. Using a multi meter, check for continuity thru the fuses. If you have continuity, call your technician. If one or both fuses show no sign of continuity, replace the fuse(s). Make sure that the thermostat is working and sending a signal to the indoor air handler. You may be able to check this by turning the fan switch to "Fan" and see if the blower turns on. You may just have a bad thermostst. Caution should be used anytime you are near electrical components. If you do not have the skill-set required to test electrical equipment, leave it to a proffessional.

Posted on Sep 04, 2007

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Re: Carrier air conditioner

I have nothing on my thermostat. I was going to install a programable thermostat so I disconnect my old one. When I couldn't use the new one I reinstalled the old one and now it's like there is no power to it. Checked circuit breakers and found none tripped and tried thermostat in upstairs since I have two thermostats and it works fine there What next???

Posted on Jul 22, 2009

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