The AC and Furnace on systems using CCC2 digital thermostat ... non In Command also use the CANBUS to communicate .... ALL inputs must go thru Zone 1 AC electronic control module. The furnace is tied into Zone 1 ECM to receive its signals across the CANBUS from the thermostat.
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2007 GMC Classic club cab 4x4 Duramax LBZ
2014 Alpine 3010 RE. 34 foot fifth wheel
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