Lennox HVAC Unit ML193UH110XE60C

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.

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.

Exhaust and Air Intake Pipes Inspection

Check the exhaust and air intake pipes for tightness.

Ensure there is no blockage in the exhaust and air intake pipes.

Disconnect all electrical power to furnace

Label all wires prior to disconnecting

Reconnect wires correctly after servicing

Blower Inspection and Maintenance

Check the blower wheel for debris

Clean the blower wheel if necessary

Verify proper operation after servicing

WARNING! ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD.

Disconnect all electrical power to furnace before servicing.

Label all wires prior to disconnecting when servicing controls.

Ensure wires are reconnected correctly after servicing.

Filter Inspection and Maintenance

Inspect all air filters for cleanliness and damage.

Is cleaning or replacement of any filter necessary?

Clean or replace filters as necessary to ensure proper furnace operation.

Turn off electrical and gas supplies to the furnace

Mark all gas valve wires and disconnect them from valve

Remove gas supply line connected to gas valve

Remove sensor wire from flame sensor and disconnect 2-pin plug from the ignitor

Disconnect wires from flame roll-out switches

Remove four burner assembly screws at the vestibule panel and remove gas valve/manifold and burner box as a single unit