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What brand are the units? Assume you are hooked up to 30amp service and have power (checked circuit breakers etc) to the thermostat and the unit itself? Does the fan come on when just in fan only mode?
In a home AC unit typically the compressor motors use a capacitor start system. When they fail to run it can often be as simple as replacing the capacitor but I am not sure about your particular AC units.
My 2004 coach AC units sometimes take several minutes before they start up after turning them on at the digital thermostat wall mounted controller. IAt first I thought they were not working but they always start eventually.
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Last edited by Tim Hancock; 09-05-2024 at 09:51 AM..
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