Sounds like the thermostat is stuck. Or, more correctly, the
electrical contacts within the thermostat.

--
Christopher A. Young
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wrote in message
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I have to work it manually. I can hear the thermostat click if I turn
it up or down, but the compressor just runs the whole time.
The room will get too cold if I leave it run. I can have it on fan
only, and turn the thermostat all the way down and hear it click, but
if I turn it to A/C
the compressor kicks in right away.
Could there be a relay in there stuck or burnt together?
Thanks, Tony