Programmable RTHL2510/RTHL2410 - Honeywell Thermostat Manual Pdf
Step 2. Remove Old Thermostat Fig. 2. a. Turn off power to the heating/cooling system, either at the furnace or at the fuse/circuit breaker panel. b. Remove the cover of your old thermostat (Fig. 2). c. Unscrew and remove th
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