Why is the 'gas heat' option missing from my thermostat's heating choices?
The availability of specific heating modes on your Coleman-Mach 9420-381 thermostat is controlled by Dip Switches located on the back of the device. If…
Manuals+ Q&A
Coleman 9420-381 Digital Wall Thermostat Instruction Manual — questions & answers
Read product questions and troubleshooting answers linked to Coleman 9420-381 Digital Wall Thermostat Instruction Manual.