White-Rodgers 3F11-170 Fan Switch

When you need a reliable White-Rodgers 3F11-170 Fan Switch for replacement or new installation, this 1/2" bimetal disc thermostat delivers consistent performance in commercial and residential HVACR applications. Engineered with a fixed temperature range of 162°F to 178°F, this SPST fan switch features a close on rise action to engage the blower motor exactly when the heat exchanger reaches optimal operation. The 30 degree F differential prevents short-cycling of the fan, ensuring efficient heat distribution and protecting the motor from premature wear. Built on the 36T22-10853 frame, it includes an auto reset function and aluminum disc cup for rapid thermal response. The hardware features 1/4" quick connect terminals and a loose ring, stainless steel mounting bracket for streamlined field installation. This bimetal disc fan control is rated for 15A at 120VAC, making it a rugged choice for furnace and dryer high-limit or fan control cycles.

• Precise Thermal Control: Fixed 162-178°F "Make" temperature ensures internal components are protected and air delivery is consistent.
• Durable Construction: Features an aluminum disc cup and stainless steel mounting for long-term resistance to high-heat environments.
• Versatile Compatibility: Universal 3F11 series design replaces various OEM fan switch bimetal controls in appliances and heating units.
• Technical Reliability: Single Pole Single Throw (SPST) operation with automatic reset eliminates the need for manual intervention after thermal cycles.

What is the difference between close on rise and open on rise?
A close on rise switch, like the 3F11-170, completes the electrical circuit when the temperature reaches the upper limit (178°F), typically used to turn on a fan. An "open on rise" switch breaks the circuit at high temperatures, acting as a safety limit.

Does this switch require a specific orientation for mounting?
The 1/2 inch bimetal disc uses a loose ring bracket, allowing for flexible surface mounting near the heat source. For the most accurate sensing, ensure the aluminum disc cup is in direct contact with the surface or within the airflow path as specified by the equipment manufacturer.

Can this replace a different brand with the same temperature ratings?
Yes, as long as the SPST close on rise action, temperature setpoints, and electrical ratings match. Cross-referencing White-Rodgers fan switches by part number (3F11-170 or 36T22-10853) is the recommended method for ensuring proper fitment.

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.