How to Replace a Lennox Condensation Trap


Lennox gas furnaces include a combustion blower part behind the upper access panel, which is connected to the condensation trap. The trap, also known as the condensate trap, holds a small amount of condensation that is collected within the unit. The trap should be regularly drained and cleaned. If the trap gets damaged, it can easily be replaced with a new part.

Things You'll Need

  • Phillips screwdriver
  • Set the thermostat on the furnace to the lowest setting. Turn off the electrical power to the furnace from your circuit breaker.

  • Pull up on the upper access panel, and lift the panel off of the furnace. Set the panel aside. The trap is the small, black cylinder on the bottom right side of the middle combustion blower.

  • Use a Phillips screwdriver to remove the three mounting screws holding the condensation trap to the unit. Pull the trap out of the furnace.

  • Connect the new condensation trap into the same position, and reinsert the three mounting screws.

  • Slide the upper access panel back onto the furnace. Turn on the electrical power for the furnace from the circuit breaker.

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