Troubleshooting A Coleman Mach Intermittent Thermostat Issue

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Certified Mobile RV Technician, Darren Koepp, is on the hunt for a wiring problem with this Coleman Mach RV thermostat. The Heat/Cool/Fan switch sometimes works, sometimes doesn't. Watch as Darren systematically walks through different things that could be wrong and rejoice as he pinpoints the pesky culprit.

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