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How to Solve Window Air Conditioner Electrical Problems


By Dave Rongey - Summary:

Window Air Conditioners and Electrical Circuit Problems

Window Air Conditioners and Electrical Circuit Problems

Electrical Question: A TV and window air conditioner were rendered inoperable after the (5,000BTU) air conditioner was turned on (15A circuit). It appeared that the CB tripped, but it had not, so I tripped the suspected CB, checked for obvious fire hazard (burnt stuff), turned on the CB and the fault manifested itself by:

After four days of study (with problem circuits shut down), including studying your very helpful site, I commenced procedures which you suggest, hitting pay dirt at the step (to paraphrase): [examine where the trouble began,] which was at the air conditioner (but maybe not?). This is what happened (all CB’s on — my new voltage/current tester in hand) before I even started checking anything:

Heat is coming from the electric baseboard heater unit located a foot beneath the outlet which the air conditioner is plugged into; the other baseboard units are cold; the 24v thermostat unit is off.

I turned off all CB’s to the electric heat system and everything is now normal! (except the TV and air conditioner which were cooked). The switches, lights, outlets all normal. But there will be a day of reckoning — when winter comes and I have to power up the heat.

Any ideas?
I’m trying figure out how one heater unit can be on when the thermostat is off and the other heaters are off. I would hope that simply bypassing this one heater might solve the problem but I have a hunch it won’t be that simple.

Anyway, thanks for reading this. I hope you can help.

This electrical question came from: Jim, from Bethel, Connecticut

See more about Home Wiring for Connecticut

Dave’s Reply:
Thanks for your electrical question Jim

Electrical Circuit for a Window Air Conditioner

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