Lennox Cooling Unit LGH122U

Inspect the condition of all-aluminum coils

Is there any visible debris on the all-aluminum coils?

Clean the all-aluminum coils if debris is present

Inspect the condition of fin/tube coils

Is there any visible debris on the fin/tube coils?

Clean the fin/tube coils if debris is present

Examine burner flames for proper appearance during the heating season

Examine burners for any deposits or blockage before each heating season

Turn off both electrical power and gas supply to unit

Remove burner compartment access panel

Remove screws securing burners to burner support and lift the burners from the orifices

Locate the ignitor under the left burners

Remove combustion air inducer assembly

Remove flue box cover and clean

Check that all parts are in place after reassembly

Verify the cleanliness of the flue box cover and tubes

Describe any issues encountered during maintenance

Inspect the evaporator coil for dirt and debris

Clean the coil using mild detergent or commercial coil cleaner

Flush the condensate drain with water

Ensure the following are not wet during flushing

Is the coil clean and free of debris?

Shut off power supply and gas to unit

Disconnect pressure switch air tubing from combustion air inducer port

Remove and retain screws securing combustion air inducer to flue box

Clean inducer wheel blades with a small brush