the sensor has likely failed or drifted out of calibration

Engineered as a direct replacement for F77-5409

Always check the flue pipe for debris or bird nests before resetting the manual reset switch

OEM Compatibility: Seamlessly replaces the discontinued 076243-030 without the need for additional gas train modifications

5-inch remote reading dial

Nordyne 667187R Inducer Wheel the sensor has likely failedWhen you are dealing with a loud rattling or a failure to prove the pressure switch, it is often the Nordyne 667187R Inducer Wheel that has reached the end of its service life. This furnace inducer blower wheel is a critical OEM replacement part designed specifically for mobile home and residential gas furnaces. Measuring 3 inches by 2 inches, this wheel is compatible with a wide range of Nortek brands, including Intertherm, Miller, and Frigidaire