Lennox Cooling Unit LGH150S

Remove combustion air inducer assembly

Remove flue box cover and clean

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

Maintain nozzle distance at least 12 inches from coil face

Check for fractures between fins and refrigerant tubes

Reduce pressure and work cautiously to prevent damage

Clean condenser coil with detergent or commercial coil cleaner

Inspect the condition of the all-aluminum coils

Are the all-aluminum coils free from debris and obstructions?

Inspect the condition of the fin/tube coils

Are the fin/tube coils free from debris and obstructions?

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?

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