Maintenance Guides / Garage & Systems

Service combustion garage heater

Difficulty: call_a_proTime: 120 minsEst. Cost: $150 - $400

Why it matters

Combustion gas heaters in enclosed garages require flue, burner, and CO checks; incomplete combustion releases deadly carbon monoxide.

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How to do it

  • 1

    Turn off garage heater at thermostat and main power.

  • 2

    Visually inspect flue pipe for blockage, corrosion, or separation.

  • 3

    Verify heater vents to outside and does not draw combustion air from garage.

  • 4

    Check heater access panel and burner area for corrosion or rust.

  • 5

    Replace filter/screen if accessible and due for replacement.

  • 6

    Contact qualified HVAC technician for professional service.

  • 7

    Technician will perform CO/combustion gas analysis.

  • 8

    Address any issues identified by technician before heating season.