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The nylon reinforcement prevents "ballooning" under pressure
Key Benefits for Technicians High Amperage Capacity: Rated for 15A at 120/277VAC
it indicates an underlying airflow issue or combustion problem that must be diagnosed by a technician
High-Temperature Durability: Engineered insulation protects the lead from thermal degradation in high-ambient environments
Modine 5H0730570003 Block Vent Switch The nylon reinforcement prevents "ballooning"The 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),