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Old 04-15-2014, 06:41 AM   #1
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1976 25' Tradewind
Tulsa , Oklahoma
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Thermostat for Armstrong A/C

Does anyone know if a thermostat could be installed on an air conditioner which hand not been assembled with one? I own a 1976 Armstrong unit with three fan speeds. In order to keep my trailer at a comfortable temperature, I have to be the human thermostat. Too hot? Jump up and switch it up a speed. Cold? Get up and, well you get the idea.
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Old 04-15-2014, 06:49 AM   #2
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Your A/C should have another knob for the thermostat control. All the fan speed does is change air flow speed. A picture of your controls would be helpful

I have two Armstrongs and both have thermostats. It is necessary to keep the compressor from freezing up.
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Old 04-15-2014, 12:42 PM   #3
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There should be one. If not, it was probably removed by a former owner, and can be added again. There are universal replacement parts available that should work.
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Old 04-17-2014, 05:36 AM   #4
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Now of course I've got the separate wall thermostat for my Suburban furnace, but it has no cool switch. It is very odd, all my a/c really is a window unit with the output duct running down instead of straight, and I have never seen a window unit without a thermostat. I am at a loss why they designed it that way. The compressor never cycles. There certainly isn't a panel switch, maybe they figured with all the heat loss through windows full speed would be all anyone would use.
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Old 04-21-2014, 05:59 AM   #5
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I removed the inside cover and found a schematic that implied wiring to a thermostat. It also had three wires that had been cut and taped off.
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Old 04-21-2014, 02:08 PM   #6
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There should be a separate thermostat located somewhere in the living room area that controls the A/C compressor. Fan must still be turned off manually but the compressor and heat strip will come on and off based on that thermostat. Look for a patched hole somewhere on your roadside living room area close to the kitchen.
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Old 04-21-2014, 02:57 PM   #7
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pictures???
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