My honeywell RTH2510B does not have a C terminal. Where do I connect the blue wire that was on the C terminal of my old thermostat?
WE've tried connecting it to the B terminal, nothing comes on. We've taken the blue wire out and wrapped it with electrical tape, nothing either. This thermostat also has batteries
Heating & Cooling - Honeywell
Answers & Comments
Terminal X is also common.