i'm having problems with this again its been working ok now it has a mind of its own either all or nothing there is a red flashing light below my green light on the reciever is this the problem
honeywell thermostat
- Thread starter eddie677
- Start date
model number is cm921 and yes have changed batteries thanks
Have you rebound the controller to the receiver as written in the instruction? This is a communications error.
nope how do you do that don't have the instructions
Found the instructions and seems to have worked thank you very much 
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