Where the money goes
Part $100–$350Labor $0–$700Typical labor time: 1–2 hrs
You might need this if…
DIY difficulty: hard•Multiple error codes
•Erratic furnace behavior
The part
The control board manages ignition sequence, safety checks, and blower operation. Board failures cause varied error codes.
Error codes that lead to this repair
E5Low-voltage fuse is openCall a pro soon24Low-voltage fuse is openCall a pro soon45Control-board faultCall a pro soon24Low-voltage fuse is openCall a pro soon45Control-board faultCall a pro soon9 BlinksPower polarity or grounding faultCall a pro soonE5Low-voltage fuse is openCall a pro soon10 FlashPower polarity or grounding faultCall a pro soon24Low-voltage fuse is openCall a pro soon45Control-board faultCall a pro soon10 FlashPower polarity or grounding faultCall a pro soon9 BlinksPower polarity or grounding faultCall a pro soon9 BlinksPower polarity or grounding faultCall a pro soonE5Low-voltage fuse is openCall a pro soon10 FlashPower polarity or grounding faultCall a pro soon10 FlashPower polarity or grounding faultCall a pro soon10 FlashPower polarity or grounding faultCall a pro soon
This is general information, not professional advice. Gas, electrical, and combustion repairs can be dangerous — when in doubt, call a licensed technician.