▲ 3 r/hvacadvice
New Thermostat, no function
Old thermostat died (Honeywell T2060F) (no display even after battery change)
Purchased a RTHC20B as a replacement, attached the tires as seen, verified correctness on furnace control board, verified breakers are on.
But I have no function out of it, no fan heat or AC.
Not sure what to check from here. Fan/furnace/AC worked perfectly before the old thermostat died and stopped showing display.
u/Federal_Software6076 — 5 days ago