there is no digital readout and no heat....the air side is fine (Coleman Mach 8330D3351 Zone Control 8-Series 4 Stage Digital RV Thermostat

Answer

Jan 25, 2019 - 05:09 AM

If you have no display, you may have a bad connection to the ground wire. You can use a voltage reader and make sure that the voltage between the blue and red wires is a constant 12V DC no matter what setting the thermostat is in.

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there is no digital readout and no heat....the air side is fine

Coleman Mach 8330D3351 Zone Control 8-Series 4 Stage Digital RV Thermostat - White

The Coleman Mach Thermostat is a replacement 4-stage zone control digital RV thermostat. It works with a control box to control up to four single stage air conditioners or heat pumps, and up to two furnaces.

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