Modine 5H0735930000 Limit Switch

The Modine 5H0735930000 Limit Switch is a mission-critical safety component engineered for precise thermal regulation in Modine unit heaters and HVAC systems. This OEM replacement part, also identified by part number 5H73593, is an auto-reset limit switch designed to protect equipment by breaking the electrical circuit when internal temperatures exceed safe operating parameters. Operating within a 100-140°F temperature range, this switch automatically opens at 140°F to prevent heat exchanger damage and resets once the temperature drops back to 100°F. Field-proven for its reliability, the 5H0735930000 is compatible with widely used Modine gas-fired heaters, including the PDP125, PDP150, and PDP250 series. Utilizing a 36TX41 thermal disc configuration, this high-limit control ensures the safety circuit remains closed during normal operation. For contractors performing maintenance or emergency repairs, verifying the L140-40F specification is vital to maintaining system integrity. This 115V rated switch provides a direct fit for 5H73593, 4034120, and 5H71958, facilitating seamless field installation and ensuring consistent high-temperature protection.

• OEM Compatibility: Precision-manufactured to match original factory specifications for Modine 5H0735930000 and 5H73593 models.
• Automated Safety: Features an automatic reset mechanism that eliminates the need for manual intervention after a temporary overheat condition.
• Wide Application: Fits a broad range of Modine unit heater parts including PDP, BA, BAE, and PA series heaters.
• Durable Thermal Disc: Constructed with a high-grade bimetal disc for responsive and accurate temperature sensing between 100°F and 140°F.
• Simplified Replacement: Standardized mounting and electrical layout for efficient "drop-in" service in commercial and industrial settings.

Is the 5H0735930000 a manual or auto-reset switch?
This is an auto-reset limit switch. It will automatically re-close the circuit once the system temperature cools to approximately 100°F.

Can this part replace a 5H73593?
Yes, the 5H0735930000 is technically identical to the 5H73593 and serves as the official replacement part.

What happens if my unit heater limit switch stays open?
If the high-limit switch fails or stays open, the furnace or heater will typically run the indoor blower but will not allow the gas valve or burner to ignite, acting as a safety lockout.

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.