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Window a/c thermostat switch

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By tab a
in DIY Appliance Repair Help

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Posted
Posted

My ancient Montgomery Ward 220v window unit quit working. With the thermostat switch (rotary knob--rheostat?) bypassed it seems to work ok. Can I just leave it this way, as it's always on full cold anyway?

Thanks.

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kdog Sensei

kdog

Posted
Posted

Yes but it will never cycle off; unless you turn off breaker etc

applianceman18007260692 Sensei

applianceman18007260692

Posted
Posted

Yall can bypass all the controls however once the ac has cooled down the house then it will freeze over. I hot-wired one and made this video:

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Posted
  • Author
Posted

There are 2 different knobs: One turns the unit on--a/c high, a/c med, fan hi, fan med, etc., and the other is the thermostat. It can be turned completely off, or turned to a progressively colder setting--the rheostat function I mentioned.

My concern was icing, but I've no way of knowing if the unit has ever gotten the room/house cold enough for the thermostat to cycle it off.

I watched the video but couldn't tell what I was supposed to be seeing?

Thanks.

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