White-Rodgers 3F11-100 Fan Switch

The White-Rodgers 3F11-100 is a heavy-duty 1/2" bimetal disc fan switch engineered for high-reliability thermal regulation in domestic and commercial HVAC sets. This SPST fan control features a close on rise switch action, designed to activate blowers or auxiliary fans when temperatures reach the fixed temperature range of 93°F to 107°F. Built on the Therm-O-Disc 36T22 (style 10844) platform, it utilizes an aluminum disc cup and stainless steel mounting brackets for rapid thermal response and high-speed contact separation. This automatic reset fan switch maintains a 30°F differential, ensuring the circuit opens once the temperature drops significantly below the setpoint to prevent short-cycling. With electrical ratings of 15A at 120VAC and 10A at 240VAC, this snap-action thermostat is a standard replacement for many OEM heating systems and appliances. The 1/4" quick-connect terminals and loose-ring flange design allow for versatile orientation and straightforward integration into existing control circuits.

• Precise Thermal Control: Fixed 93° to 107°F range with a 30°F differential ensures stable fan operation cycles.
• HVAC Industry Standard: Features SPST close on rise action, widely used in furnace blower systems and fan-forced heaters.
• Durable Construction: High-performance bimetal disc housed in a compact 1/2" body with 1/4" quick-connect terminals.
• Automatic Reset Logic: Eliminates manual intervention by resetting the circuit automatically after cooling.
• Broad Compatibility: Replaces Therm-O-Disc 36T22-10844 and other common high-volume fixed disc configurations.

Is the White-Rodgers 3F11-100 a normally open or normally closed switch?
This is an SPST Close on Rise switch, which functions as a normally open contact that completes the circuit when the temperature climbs to the setpoint.

What are the electrical load ratings for the 3F11-100?
It is rated for 15A resistive at 120VAC and 10A at 240VAC, making it suitable for standard fan motor and pilot duty applications up to 125VA.

Can this bimetal disc be used as a limit control?
No, since this model closes on temperature rise, it is intended for fan operation. Safety limit controls typically require an "Open on Rise" action to break the circuit during an overheat condition.

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.