Lennox Gas Furnace GHR32V5-100

Inspect filters for dirt and debris

Are the filters reusable foam filters?

Wash reusable foam filters with water and mild detergent

Dry the filters completely before reinstallation

Spray filters with filter handicoater

Is filter replacement necessary?

Select the replacement filter size

Shut down the unit for an extended period

Will the unit be exposed to sub-freezing temperatures?

Drain water from the condensate trap

Remove the 3/8” cap located on the bottom corner of the condensate trap

Check for blockage in the condensate trap

Ensure proper drainage of the condensate trap

Turn off electrical and gas power supplies to furnace.

Remove upper and lower furnace access panels.

Place papers or protective covering in front of furnace.

Remove 3/8” rubber cap from condensate drain plug and drain. Replace cap after draining.

Disconnect and remove intake pipe from air intake fitting.

Mark all gas valve wires and disconnect them from valve.

Remove gas supply line connected to gas valve.

Check all wiring for loose connections

Check circuit breaker located in unit control box

Enter the voltage at unit (unit operating)

Is the heat operating (if applicable)?

Turn off electrical and gas power supplies to furnace.

Remove upper and lower furnace access panels.

Disconnect and remove intake pipe from air intake fitting.

Mark all gas valve wires and disconnect them from valve.

Remove gas supply line connected to gas valve.

Disconnect gas valve sensing hose from valve.

Remove burner box cover (4 to 6 screws).