Lennox Cooling Unit LCH102H

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

Locate the ignitor under the left burners

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 after maintenance?

Remove combustion air inducer assembly

Remove flue box cover and clean

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

Spray the coil steadily and uniformly from top to bottom with water

Ensure water pressure does not exceed 900 psi

Ensure spray angle does not exceed 45 degrees

Ensure nozzle is at least 12 inches from the coil face

Check for fractures between the fins and refrigerant tubes

Reduce pressure and work cautiously to prevent damage

Clean condenser coil with detergent or commercial coil cleaner