The heating tune up checklist
- Full ignition sequence run and observed
- Igniter condition and resistance checked
- Flame sensor cleaned and flame signal measured in microamps
- Burner flame quality and gas pressure verified on gas equipment
- Heat exchanger inspected for cracking and corrosion where accessible
- Inducer motor, pressure switch, and venting inspected
- Blower cleaned as needed and amp draw measured
- Static pressure and temperature rise measured against specification
- Safety controls including limits and rollout switches tested
- For heat pumps: heating mode, reversing valve, defrost cycle, and backup heat stages
