Modine 5H0750020004 Rollout Switch

The Modine 5H0750020004 Rollout Switch is a critical safety component designed for Modine unit heaters and furnace systems. Maintaining a 350F temperature rating, this manual reset rollout switch (M/R) acts as a high-limit protection device that monitors for flame rollout or excessive heat buildup near the burner assembly. This specialized HVAC replacement part is the official manufacturer-designated direct replacement for 5H75002-4, ensuring seamless mechanical and electrical compatibility with existing wiring harnesses. When the L350F switch detects temperatures exceeding its threshold, it immediately opens the safety circuit to de-energize the gas valve, preventing hazardous conditions such as heat exchanger failure or flue blockages. For veteran technicians, this OEM component provides the precise 350-degree trip point required to maintain factory safety specifications and system integrity in HD, HDS, and PTS series units. Using an OEM Modine limit switch ensures the safety circuit operates within the exact tolerances of the original equipment engineering.

Key Benefits

• Precise Safety Protection: Specifically calibrated to a 350F trip point to prevent thermal damage to the cabinet and critical burner components.
• Direct OEM Compatibility: Engineered as a drop-in replacement for 5H75002-4, eliminating the need for field modifications or bracket adjustments.
• Manual Reset Functionality: Requires a physical reset by a technician, ensuring the underlying cause of the lockout—such as a cracked heat exchanger or blocked vent—is inspected.
• Rugged Build Quality: Constructed with high-grade materials to withstand the high-temperature environment of the burner box in industrial and commercial HVAC applications.
• Fail-Safe Logic: Provides a "normally closed" contact state that reliably opens upon detection of flame rollout.

Common Questions

Can I replace a manual reset switch with an automatic reset switch?
Technicians must always use the reset type specified by the manufacturer. A manual reset rollout switch is a safety requirement; using an automatic reset could allow a dangerous condition, like a heat exchanger failure, to cycle repeatedly without inspection.

What causes a 350F rollout switch to trip?
Tripping at "L350F" typically indicates that fire is literally "rolling out" of the combustion chamber. This is often caused by a blocked flue, failed inducer motor, excessive manifold gas pressure, or a compromised heat exchanger.

Is the 5H0750020004 compatible with older 5H75002-4 models?
Yes, the 5H0750020004 is the updated manufacturer part number and is functionally identical to the 5H75002-4, designed specifically to maintain the same form and function in the safety string.

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.