"im replacing the old thermostat wich have only 2 wires red and white and no other marking.where do I plag the wires with my new honeywell thermostat RTH221B WICH HAVE 5 option for connection?
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"im replacing the old thermostat wich have only 2 wires red and white and no other marking.where do I plag the wires with my new honeywell thermostat RTH221B WICH HAVE 5 option for connection?
Use W=White and R (it might be marked RH)=Red this is for heat only
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