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Ships within 48 hours · Estimated delivery Sep 13 - Sep 18
Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
If the air handler is blowing cold air during a call for heat (W1/W2)
Key Benefits Precise Electrical Control: Accurate 17
Direct OEM Replacement: Drop-in compatibility for models like NUG5
it prevents unsafe operation due to blocked flues or motor failure
Key Benefits: Enhanced Durability: Cast metal construction withstands high-torque operational stress and environmental wear
Armstrong Furnace R40403-003 Control Board Els PW 17895 If the air handler isThe Armstrong Furnace R40403 003 is a direct OEM replacement blower control fan timer board, engineered to regulate the timing and sequence of the indoor blower motor in residential forced air systems. This furnace control board is the designated successor to the discontinued 40403 001 model, offering exact form fit function for 80% and 90%+ AFUE gas furnaces. As a solid state timer board, the R40403 003 manages internal safety logic and fan off