McDonnell & Miller 324500 O-Ring The Modine 5H0730570003 Blocked Vent

The Modine 5H0730570003 Blocked Vent Switch is a critical safety component engineered to monitor flue gas temperatures and prevent hazardous operating conditions

this limit control integrates seamlessly into the furnace’s formal safety string

Please contact our team to confirm compatibility or technical details before purchasing

Durable Construction: Heavy-duty brass design resists corrosion and thermal fatigue

Replacing a drifted or open limit switch restores the proper fan limit control sequence

McDonnell & Miller 324500 O-Ring The Modine 5H0730570003 Blocked VentMaintain precise system pressure and eliminate leak paths with the McDonnell & Miller 324500 Tetraseal O Ring. This pack of five high performance seals is the engineered replacement for the discontinued 324435 part number, ensuring a direct fit without the need for field modifications. Designed as a critical boiler control replacement part, these o rings are specifically optimized for low water cut off (LWCO) and mechanical water feeder assemblies.