Rth221b1021 Wiring Diagram

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To perform a hard reset on. When you make use of your finger or perhaps stick to the circuit along with. Installation guide for honeywell rth221b programmable thermostat (rth221b1000, rth221b1047, rth221b1021, rth221b1039) on 2 pages. I have 3 wires coming in. I have tried different combinations but cannot get it to work. The blue seems to be common. When i use a volt meter and touch red to blue, i get 24 volts. When i touch white to blue, i get 11 volts. Quick installation guide for honeywell rth221b programmable thermostat (rth221b1000, rth221b1047, rth221b1021, rth221b1039) on 20 pages.