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The following furnace maintenance items should be performed once a year or as needed. Some are DIY but others should be performed by a qualified technician.
- Clean the burner head to remove debris and corrosion.
- Inspect for distortion or large holes.
- Replace as necessary.
- Check and clean igniter for carbon or corrosion.
- Check for cracks in porcelain.
- Replace if bad.
- Clean the orifice.
- Check amp draw of gas valve solenoids and replace if weak or bad.
- Check electrical connections to be sure they are tight.
Blower and Combustion Wheels
- Inspect for balance and replace if damaged.
- Clean dirt and obstructions off wheel.
- Inspect air intake and exhaust for mud dabber nests.
- Clean chamber per manufacture approved methods.
- Inspect chamber for cracks and holes. None are allowed.
- Replace if it fails or makes abnormal noises
Circuit Board and Wiring
- Inspect board for water damage, loose solder joints and excessive dirt.
- Check furnace wiring for broken or melted insulation. Always replace with correct temperature rated wiring.
Ducts and Plenum
- Check that ducts are connected properly to the plenum box.
- Check for smashed or torn ducts.
- Check for register damage and that rugs or other objects are not blocking air flow.
- Check CFM and air temperature coming out of ducts.
- Do gas pressure drop test at test port near burner.
- Verify that pressure is sufficient with other propane devices running.
- Low gas pressure can cause incomplete combustion and sooting.
- Use approved leak detector to check any fittings that were opened during testing.
- Remove switch and clean dirt or lint.
- Check switch for operation and verify it does not stick closed
- Check that 12VDC voltage is within proper operating limits.
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