Armstrong Furnace R40403-003 Control Board Els PW 17895 Safety Compliance: Prevents heat exchanger

Safety Compliance: Prevents heat exchanger warping and hazardous rollout by interrupting power to the gas valve upon overheating

Adjustable Timing: Features field-selectable fan-off delays ranging from 90 to 180 seconds to match the home's specific heating load and comfort requirements

it is recommended to mount the valve with the coil in a vertical-up position

7/8 filter drier

Armstrong Furnace R40403-003 Control Board Els PW 17895 Safety Compliance: Prevents heat exchangerThe 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