present in almost every household on the American continent. Fix the Mood Swings on Your Digital Thermostat. When I disconnected it from the old digital thermostat(A White/Rogers model F179 I did n read more. Hard Wired Programmable Room Thermostat.
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Buy it now sioux falls hookup or Best Offer.77 P P, model THX9421R5021WW. Did we overlook something? Sometimes, the display screen doesnt read anything. Make sure your thermostat is indeed broken before you start snapping the wires loose and unplugging it from your furnace or AC unit. One reason the thermostat display might read blank its because the circuit breakers on your central air conditioner or furnace might have tripped. R and W to signal the pump relay. Radio frequency digital room thermostat with. Update: I tried hooking it up as suggested, but have the same problem.
Also see these other honeywellt87 wall thermostat wiring diagrams - Honeywell Wall T87-F type Thermostats for sketches and drawings of Honeywell thermostat wiring hookups.
I hooked up a Honeywell RTH6500 stat to a Taco boiler pump control, a 2 wire system.
Replaced the old 2 conductor wire with 5 conductor (using 4 wires).