Where the money goes
Part $25–$250Labor $0–$375Typical labor time: 0.5–1 hrs
You might need this if…
DIY difficulty: easy•No heat call reaching furnace
•Display blank or erratic
•Short cycling
The part
The thermostat sends the heat call to the furnace. A faulty or incompatible stat can mimic furnace failures.
This is general information, not professional advice. Gas, electrical, and combustion repairs can be dangerous — when in doubt, call a licensed technician.