Modine 5H0730570008 Switch 321894-709 and FX4D series air handlers

and FX4D series air handlers

maintaining the precise static pressure required to close the pressure switch and initiate the ignition sequence

ensuring a pressure-tight assembly compatible with Series 3R rigid rods or Series 3W wire suspended electrodes

OEM Compatibility: Exact replacement for Heil Quaker ICP 1171483

making it a reliable solution for retrofitting older heating systems

Modine 5H0730570008 Switch 321894-709 and FX4D series air handlersThe Modine 5H0730570008 Blocked Vent Switch is a critical safety component engineered to monitor exhaust integrity in Modine gravity vent heaters, including PA, PAE, and PD series units manufactured after 1986. Functioning as a high limit spill switch, this manual reset device detects flue gas spillage caused by downstream obstructions or inadequate draft. By monitoring temperatures within the draft diverter, it interrupts the 24V control circuit to