The Rheem PROTECH 47-22861-02K Manual Reset Limit Switch is an OEM replacement temperature safety control designed for compatible Rheem and Ruud heating equipment.

Also identified by item number 47-22861-02, this flanged airstream limit switch is designed to monitor temperature within an approved heating system application. When the temperature reaches the switch's specified limit, the switch opens its electrical contacts to interrupt the applicable safety circuit.

Unlike automatic-reset limit switches, the Rheem 47-22861-02K features a manual-reset design. This requires the switch to be manually reset after activation, once the underlying overheating condition has been identified and corrected.

The flanged airstream configuration is intended for equipment-specific mounting in the monitored airflow path. Proper installation helps maintain the manufacturer's designed temperature safety protection.

Ideal for professional furnace maintenance and repair, this OEM replacement switch helps restore proper operation of compatible Rheem and Ruud heating equipment.

Key Features & Function

• Brand: Rheem / PROTECH
• Manufacturer Part Number: 47-22861-02K
• Item Number: 47-22861-02
• OEM Description: Limit Switch – Manual Reset (Flanged Airstream)
• Manual-reset temperature safety control
• Flanged airstream mounting configuration
• Temperature-actuated electrical switching
• Helps protect heating equipment against excessive temperatures
• Designed for compatible Rheem and Ruud heating systems
• Equipment-specific electrical terminals and mounting
• OEM replacement for approved applications
• Intended for professional HVAC service and maintenance

Product Details & Specifications

Specification Note: The exact opening temperature, electrical contact rating, mounting dimensions, and compatible equipment models have not been independently verified. Confirm these details against the original component and Rheem's technical documentation.

HVAC Depot Pro Tip

A manual-reset limit switch that has tripped may indicate a significant overheating condition requiring immediate attention.

Before replacing or resetting the Rheem 47-22861-02K, determine why the heating system exceeded its intended operating temperature.

Recommended diagnostic checks:

1. Verify the furnace model and serial number.
2. Confirm the original limit switch part number.
3. Inspect the air filter for dirt or restrictions.
4. Check supply and return airflow.
5. Verify proper blower motor operation.
6. Inspect the heat exchanger and heating assembly as required.
7. Examine switch terminals and wiring for overheating.
8. Verify the replacement has the correct temperature rating and mounting configuration.

HVAC Depot Pro Tip: A manual-reset limit switch should never be replaced with an automatic-reset version unless specifically authorized by the equipment manufacturer.

Important: Never bypass or jumper a furnace safety limit switch. Do not repeatedly reset a tripped switch without diagnosing and correcting the underlying overheating condition.

Disconnect electrical power before servicing. Installation and testing should be performed by a qualified HVAC technician.

Equipment / Model Compatibility

The Rheem 47-22861-02K is intended for select Rheem and Ruud heating equipment requiring this specific manual-reset flanged airstream limit switch.

Exact compatible equipment models have not been independently verified.

Before ordering, confirm:

• Complete furnace model number
• Equipment serial number
• Original switch part number
• Required temperature rating
• Manual-reset configuration
• Flange dimensions and mounting position
• Electrical terminal arrangement

Compatibility Notice: This is not a universal furnace limit switch. Confirm that the manufacturer specifies 47-22861-02K or an approved equivalent for the equipment.