Lennox ML180 User's Information Manual

To reset the Lennox ML180 furnace, locate the reset button on the furnace control panel. Press and hold the button for about 5 seconds until the system restarts.
Common error codes include E200 (pressure switch error) and E292 (flame failure). For E200, check for blocked vents or hoses. For E292, ensure the gas supply is on and the ignitor is working.
It's recommended to check the air filter every 1-3 months and replace it when it appears dirty or clogged to maintain efficient furnace operation.
Turn off the power to the furnace, remove the flame sensor using a screwdriver, and gently clean it with fine-grit sandpaper or emery cloth to remove any buildup.
Ensure regular maintenance including filter replacements, annual professional inspections, sealing ducts, and keeping vents unobstructed to improve efficiency.
Unusual noises may be caused by loose components, a dirty burner, or an issue with the blower motor. Inspect and tighten any loose parts; if the noise persists, contact a professional.
Lennox ML180 typically uses electronic ignition, so it doesn't have a traditional pilot light. If experiencing issues, verify electric connections and consult a technician.
Check the thermostat settings, ensure the furnace is receiving power, and inspect the air filter. If the issue persists, the blower motor or heat exchanger may need attention.
Frequent cycling can be due to a clogged air filter, thermostat issues, or an oversized furnace. Check and replace the air filter, and verify the thermostat settings.
Regular tasks include checking and replacing filters, inspecting and cleaning the blower assembly, checking the flue for obstructions, and scheduling annual professional inspections.