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I have a (very) old Honeywell thermostat that I want to replace with a CM907 thermostat. I have the wiring diagram for the CM907 but not the old one. What I am finding a little confusing is that there appears to be only two wires needed for the CM907 but three wired into the old thermostat.
I would welcome some advice as to what I should do to transfer the wiring.
I have included some picture of the old thermostat and its wiring.
Thanks
Ridley
I would welcome some advice as to what I should do to transfer the wiring.
I have included some picture of the old thermostat and its wiring.
Thanks
Ridley