Question about Carrier 38CKC042 Air Conditioner

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Carrier Air conditioner

The thermostat is totally dead. No breakers are tripped. All other power in the house is on. Tried finding any other breakers on the unit, but unsuccessful.

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Most likely the transformer is shot on the air handler. To test this go to the thermostat and move the selector to fan on, if the fan blows it's not the transformer. Let me know. THX RepairUSA

Posted on Sep 02, 2007

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Dr Mercola Pure & Clear air purifier model# PC_AP2000. Unit stopped working, will not turn on. Cannot find a fuse in this unit. All else is in perfect working order. Thank you for your help.


The unit would be fused through the circuit breaker it gets power from in the main box of the house or in some cases a sub box to the main house circuit breaker box. If it is tripping the breaker something is seriously wrong and to reset over and over causes a fire risk, call a repair person.

Jan 24, 2017 | Heating & Cooling

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A relay in my rooftop model 57915.33 chatters intermitently and trips the shore power breaker.


The reason the lights are not flickering and breaker not tripping when 6 pin harness disconnected that goes to roof unit is because the compressor and fan are disconnected, which would be the major draw that causes it. There is a few ways you can narrow down the cause, or defective relay, but my guess is if it's causing lights to flicker and breaker to trip, it's on the compressor circuit. The fan coming on and off unless capacitor faulty wouldn't draw it down that much, and obviously capacitor is good otherwise it wouldn't operate good when turned on normally. I'd start by inspecting wires to and from thermostat for possible rubbing or touching against one another at a bare spot perhaps. Can't rule out 100% that thermostat isn't defective as well. When thermostat set to cooler temperature, and on, does it turn off and on in normal cycles, to maintain temperature?

Nov 27, 2011 | Dometic Rooftop RV Air Conditioner

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I have a Frigidaire air conditioner. I've never had a problem with it,at all until a few minutes ago. It all of a sudden quit working. I pushed the reset button and tried to push power, but nothing....


First check the outlet the unit is plugged into. It may be dead, due to a circuit breaker being tripped. Also, the interior of the outlet may be damaged or has a loose wire.

If a circuit breaker was tripped, unplug the unit before resetting the circuit breaker. Then plug the unit back in and turn it ON. If the breaker trips again, there may be a short in the AC wiring or there is another electric appliance on that same circuit, that may be causing an overload, when the AC unit is ON.

Hope this helps you to start troubleshooting the problem. Thanks for choosing FixYa.

Aug 10, 2011 | Frigidaire Heating & Cooling

1 Answer

Inside Electric Furnace/Air Handler Not Working. Please help!


ok this can be simple or tricky is the breaker that trips the same size as the one in the breaker panel 2.look in the unit itsself see if there r breakers inside the unit there usually are and they might have tripped it might be as simple as flipping a breaker but the problem with the breaker tripping is what concerns me now it may just be undersized or getting weak and finally crapped out get ur meter and flip the breaker on and see if u r getting power to the unit if ur not u have gott a breaker that isnt letting power go thru now if u have power u might have a bad blower motor turn the unit on and calling for the fan on if the fan doesnt start try spinning the blower by hand now if it starts then u probably have a bad capacitor they r usually mounted on the side of the blower housing it is oval and its gonna be a 5mfd(microfarad) or 7.5mfd and that couldve been what was kicking the breaker now if the blower is stuck and it wont turn or its very hard to turn then make sure the blower wheel hasnt slipped on the shaft and is rubbing up against the housing if it is just loosen the set screw and set it back even and tighten it back up now if the wheel is free and its still hard to turn then u have a bad blower motor its not a big deal to change out and not real expensive if this dont help hit me back and well walk thru it hope this gets lil momma and the pets warm have a good day

Feb 26, 2010 | Heating & Cooling

1 Answer

Bathtub pump totally dead, pump ran dry for 10 sec, is there circuit breakers on pump motors, switch or is it the motor shot. any way to test motor with removing it?


Normally pump motors are connected on a separate
circuit with its own circuit breaker. At your house there is always a electrical control panel housing several circuit breakers for lights, power outlets, range, aircon, motors, etc...Find a tripped off breaker and reset it. To reset the circuit breaker is to switch it to off position and back to on position. Better still you may reset all the circuit breakers except the main
circuit breaker (biggest amp rating).
After resetting the circuit breakers, try to switch your
bathtub pump on, (to test it, if it is still okey). Other-
wise, your motor is damaged and you got to have the
motor rewinded, to be operational.

Dec 09, 2009 | Plumbing

1 Answer

Heat pump cutting off and knocks out power to house.


Wow!.
Wires buzz where, What are the hooked into? On he heat pump? At the breaker Box?

I would have electric company check incoming pole lines & transformer. Was there a bad electrical storm in your area?

You may also have a bad Main breaker box, Is it out in the weather? Terminals may be corroded.

Pulling power from other breakers means you have a dead line or low voltage/amps on that line, Or a dead short That much power you should see welding & melting of wires.

Good Luck! Be very Careful. MSG me back let me know if i can help more.

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1 Answer

Have a 155000 btu ready heater


It sounds like the unit is tripping the breaker because the breaker is not rated high enough to handle the heaters power usage! If its not that then it may very well be the thermostat needs replaced in unit!
Test at a friends house to see if its your system or the unit!

Dec 18, 2008 | Reddy Heater-30-55,000 BTU Variable

1 Answer

Totally dead. Vizio GV42L


If the circuit breaker was tripped, more likely the fuse inside the TV power supply might also be blown. If that is the case there might be a short circuit in the power supply components, more likely on a diode or transistor/mosfet.
Contact these website to see if they have the parts for your plasma.
Good Luck.

Dec 03, 2008 | Vizio GV42L 42 in. LCD Television

1 Answer

My digital thermostat has shut off after a power failure. There is absolutley no display appearing. I pulled the thermostat off thinking maybe the batteries were no longer working but came to find out that...


What you have is a 24v control circuit problem. There is a transformer in the air handler ( inside unit ) you will have 220v on the one side and 24v on the other. If you have 24v from transform there is a small fuse on the pc board that could blow during power problems. On the inside cover you should find a wiring diagram.

Oct 01, 2008 | Carrier 38CKC042 Air Conditioner

1 Answer

A/c unit not working. Have thermistat set on 65 and temp. in house is around 85. check the breaker box for the house and it have not tripped


You must make sure that there is power to both the inside unit and outside unit. Is the room air blower blowing? If not you have either a plugged filter, iced up coil, the access door is not quite closed or there is no power to the unit. Is the outside unit fan turning? If not, you either have no call from the thermostat, the fan is broken or the unit has no power to it. I would turn off the breaker to the inside unit and switch the breaker near the outside unit to off and let them sit idle for 5 minutes. Switch both breakers back on and chect to see if the outside unit turns on. Then check the indoor unit and see if this starts blowing. Let us know what you find.

Jul 23, 2008 | Heating & Cooling

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