Lennox HVAC Unit ML193UH090XE36C

Winterizing and Condensate Trap Care

Prepare a shallow pan to empty condensate water

Remove the clean out cap from the condensate trap and empty water

Check for any leaks after reinstalling the cap

Dispose of the collected condensate water properly

Turn off gas and electrical power to the furnace

Remove heating compartment access panel

Disconnect the gas supply line from the gas valve

Disconnect and label wires from gas valve

Disconnect ignitor wiring at 2 circuit plug

Disconnect and label wires from rollout switch

Disconnect and label flame sensor wire

Disconnect all electrical power to furnace

Label all wires prior to disconnecting

Reconnect wires correctly after servicing

Filter Inspection and Maintenance

Clean or replace filters if necessary

Check filter specifications against Lennox Product Specifications bulletin

High-Efficiency Filter Considerations

Read and understand all safety warnings before proceeding.

Disconnect all electrical power to the furnace before servicing.

Label all wires prior to disconnecting them.

Reconnect wires correctly after servicing.

Verify proper operation after servicing.

Ensure the unit is properly grounded in accordance with national and local codes.

Use copper wire only. Do not use aluminum wire.

WARNING! ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD.

Disconnect all electrical power to furnace before servicing.

Label all wires prior to disconnecting controls.

Ensure blower access panel is securely in place when blower and burners are operating.

Blower Wheel Inspection and Maintenance

Check the blower wheel for debris.

Clean the blower wheel if necessary.