Modine 53659 High Limit Switch Stalk Mount

Product Description

The MODINE 53659 is a high limit switch designed for use in unit heater and forced-air heating applications. This switch monitors supply air or heat exchanger temperatures and interrupts the control circuit when a preset high-temperature threshold is reached, protecting the heat exchanger from overheating damage. Rated at L200F-40F, it opens at 200 degrees F with a 40-degree F differential and resets at 160 degrees F. It uses a stalk mount configuration for direct surface attachment to the heat exchanger or plenum wall. HVAC technicians and commercial heating service pros typically handle installation and replacement of this component.

This high limit switch is used in gas-fired unit heaters and similar forced-air heating equipment where overheat protection is required. It fits into the control circuit as a normally closed safety device, opening on temperature rise and automatically resetting once temperatures return to the safe operating range. It is a direct OEM-style replacement part carrying alternative part numbers 3H40078-2 and 3H0400780002, and it replaces superseded part numbers 5H75769-2 and 5H0757690002. Typical installations are found in commercial and industrial heating units.

Key Features

• High limit switch rated L200F-40F: opens at 200 degrees F, resets at 160 degrees F
• Stalk mount design for direct attachment to heat exchanger or plenum surface
• Normally closed contact configuration interrupts control circuit on overheat condition
• Automatic reset operation returns to closed position once temperature drops to reset threshold
• Direct replacement for superseded part numbers 5H75769-2 and 5H0757690002
• Cross-references OEM numbers 36TV01B3, 44842, A1035, and L200F-40F

Compatibility

Replaces MODINE part numbers 5H75769-2 and 5H0757690002. Also cross-references OEM part numbers 36TV01B3, 44842, A1035, and L200F-40F. Alternative part numbers for this component include 3H40078-2 and 3H0400780002.

Installation Notes

Installation and replacement of high limit switches should be performed by a licensed HVAC technician familiar with gas-fired heating equipment. Disconnect all power to the unit and allow the heat exchanger to cool completely before removing or installing the switch. Verify the replacement switch temperature rating matches the original equipment specification before installation. Follow applicable local mechanical codes and the equipment manufacturer service documentation during the replacement procedure.

Technical Specifications

• Switch Type: High Limit Switch
• Temperature Rating: L200F-40F
• Opens At: 200 degrees F
• Reset Temperature: 160 degrees F
• Differential: 40 degrees F
• Mount Type: Stalk Mount
• Reset Type: Automatic

Standard Information

• Brand: MODINE
• Manufacturer Part Number: 53659