Lennox 11U72 Pressure Switch – 104371-09 – 0.90" W.C.

Specifications

Part Number: 11U72
Manufacturer Part Number: 104371-09
Brand: Lennox
Product Type: Furnace Pressure Switch
Pressure Setting: 0.90" W.C.
Switch Configuration: SPST – Normally Open
Contact Rating: 5 Amp Resistive at 24 VAC
UPC: 66255152627
Application: Lennox gas furnaces
Genuine OEM Replacement Part

The Lennox 11U72 pressure switch monitors the furnace combustion air/inducer system. The switch must prove the proper pressure before the furnace control board will allow the ignition sequence to continue.

Replaces / Cross References

The 11U72 / 104371-09 is listed as replacing older Lennox pressure switch numbers:

103614-19
103614-09

Always verify the pressure rating and furnace model before ordering.

Common Symptoms of a Failed 11U72 Pressure Switch

A faulty Lennox 11U72 pressure switch can cause the furnace to fail to ignite, start the inducer motor but stop before ignition, repeatedly cycle through the ignition sequence, or display a pressure-switch-related fault code. A pressure switch fault can also be caused by a blocked vent, restricted intake, plugged pressure tubing, condensate drainage problem, or weak inducer motor, so these should be checked before replacing the switch.

Compatible Lennox Furnace Models

The 11U72 is used on several Lennox furnace models, including models within the ML195, EL195 and EL196 series. Examples include:

ML195UH090XP60C06
ML195DF090XP60C06
ML195UH090XP48C04
ML195DF070XP36B03
EL195UH090XE48C06
EL195UH135XE60D01
EL195DF110XE60C07
EL196UH070XE36B03
EL196UH110XE60C01
EL196DF090XE48C01

Compatibility should always be confirmed using the complete furnace model and serial number before ordering.

Buy the Lennox 11U72 0.90" W.C. OEM furnace pressure switch from OemHvacPartsCanada.ca.