Ruud 47-104465-02 Gas Furnace Limit Switch Spst Auto Reset

Product Description

The RUUD 47-104465-02 is a single-pole, single-throw (SPST) auto-reset limit switch designed for use in residential gas furnaces. This normally closed limit switch opens at 120 degrees F and resets automatically at 100 degrees F, protecting the heat exchanger and surrounding components from overtemperature conditions. Rated at 230 VAC and 25 amps, it provides reliable overcurrent and thermal protection in the furnace air plenum. The switch features a red body for easy identification during service. Licensed HVAC technicians install this component as part of routine furnace maintenance or failure diagnosis.

This limit switch is a direct OEM replacement for the R92PA0401317MSA and R92PA0701317MSA RUUD gas furnace models. It mounts in the furnace cabinet and monitors air temperature to shut down the burner when airflow is restricted or temperatures exceed safe operating thresholds. Typical install scenarios include replacing a failed or nuisance-tripping limit switch during a heating season service call or full furnace repair.

Key Features

• Opens at 120 degrees F, closes at 100 degrees F for precise thermal cutout control
• Auto-reset operation restores function once temperatures return to safe range
• SPST, normally closed, 1-pole configuration for straightforward wiring integration
• Rated 230 VAC at 25 amps for reliable performance in gas furnace circuits
• Red body color aids fast visual identification during service
• Compact form factor fits standard furnace limit switch mounting locations

Compatibility

Designed as a direct OEM-style replacement for the RUUD R92PA0401317MSA and R92PA0701317MSA gas furnace models.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with local mechanical codes and the furnace manufacturer's service documentation. Power down the furnace and shut off the gas supply before removing the old limit switch or handling any wiring. Verify the replacement switch is seated fully and the sensing element is positioned correctly in the airstream before restoring power. Always confirm system operation and check for any active fault codes after completing the swap.

Technical Specifications

• Type: Limit Switch
• Switch Configuration: SPST, Normally Closed, 1-Pole
• Reset Type: Auto Reset
• Open Temperature: 120 degrees F
• Close Temperature: 100 degrees F
• Voltage Rating: 230 VAC
• Amperage Rating: 25 amps
• Color: Red
• Height: 1.4 inches
• Length: 4.7 inches
• Width: 3.8 inches
• Weight: 0.06 pounds

Standard Information

• Brand: RUUD
• Manufacturer Part Number: 47-104465-02