Modine 5H0730570003 Block Vent Switch Industrial Durability: Engineered to handle

Industrial Durability: Engineered to handle hot water

Common Questions Is a keyway required for this specific 3/8" bore size

it indicates an underlying airflow issue or combustion problem that must be diagnosed by a technician

The 5/16" diameter prevents the rod from bending under the torque generated by high-power spring-return actuators

A shorter probe may sit in a "dead zone" and fail to detect critical overheating events

Modine 5H0730570003 Block Vent Switch Industrial Durability: Engineered to handleThe Modine 5H0730570003 Blocked Vent Switch is a critical safety component engineered to monitor flue gas temperatures and prevent hazardous operating conditions. This genuine OEM replacement part is specifically designed for Modine PD400 and BD400 unit heaters, serving as the direct functional successor to the legacy 5H73057 3 model. Operating as a manual reset safety switch, it is calibrated to trip when vent temperatures reach 200F (93C),