Modine 5H0730570003 Block Vent Switch

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 200°F (93°C), effectively interrupting the burner circuit to mitigate risks associated with flue obstructions or draft failures. For technicians performing HVAC preventative maintenance or emergency repairs, installing this factory-specified blocked vent safety switch ensures the equipment remains compliant with original manufacturer safety protocols. Its robust construction provides a precise response to overheating, maintaining the integrity of the total heating system while preventing unintended automatic restarts after a safety trip.

• Direct OEM Compatibility: Ensures an exact fit for PD400 and BD400 models, eliminating the need for field modifications.
• Manual Reset Security: Requires a physical inspection by a technician before the unit can be placed back into service, following a high-limit temperature event.
• High-Accuracy Thermal Sensing: The 200-degree vent switch is factory-calibrated for reliable performance in demanding commercial and industrial environments.
• System Protection: Prevents damage to the secondary heat exchanger and surrounding components by detecting blocked vent conditions early.

Is the 5H0730570003 compatible with older 5H73057-3 switches?
Yes, this is the official Modine replacement part for the 5H73057-3. It maintains the same technical specifications and mounting footprint for a seamless swap.

Why is my heater requiring a manual reset on the vent switch?
A tripped Modine blocked vent switch typically indicates a restriction in the chimney or vent pipe, or a significant downdraft issue. The manual reset feature ensures the underlying airflow problem is addressed before the heater resumes operation.

Can I use a generic 200°F switch instead of this OEM part?
To maintain the safety rating and specified performance of Modine heating equipment, it is recommended to use the genuine OEM 5H0730570003. This ensures the thermal response time and electrical ratings match the original system design.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.