Typical repair cost

Heat Exchanger Replacement Cost (2026)

The heat exchanger separates combustion gases from indoor air. Cracks or rust can trigger rollout or CO risks.

National range
$1,500$3,500
Part $800$2,000Labor $0$2,700
Pricing data updated July 2026· labor 4–8 hrs

Where the money goes

Part $800$2,000Labor $0$2,700Typical labor time: 4–8 hrs

You might need this if…

DIY difficulty: professional-only
Rollout switch trips
Visible cracks or rust
Soot or unusual odors
The part

The heat exchanger separates combustion gases from indoor air. Cracks or rust can trigger rollout or CO risks.

Error codes that lead to this repair

This is general information, not professional advice. Gas, electrical, and combustion repairs can be dangerous — when in doubt, call a licensed technician.