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3 Flat Spade Terminals Mercury Flame Sensor (White Rodgers)

Price: $178.36
Excl. Shipping
SKU: FLS304941
(See Product Details Below for Manufacturers Part Numbers)
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Mercury Flame Sensor (White Rodgers)

Mercury flame sensors are used in pilot burners to detect the presence of the pilot flame. If the pilot flame is not burning or is insufficient to properly ignite the main burner, the flame sensor will prevent the flow of gas to the main burner.

The bulb configuration and method of mounting the sensor to the pilot burner is designed for use with F10 pilot burners only. This is not a universal replacement.


1. Unscrew flame sensor mounting nut from the pilot burner and remove old flame sensor. Do not disconnect wiring from the switch case at this time.
2. Insert replacement flame sensor in pilot burner and secure with mounting nut. Be sure the new sensing bulb is in the same position relative to the pilot flame as the sensor it replaced.
3. Carefully uncoil the capillary until the switch case reaches its mounting location. Remove mounting screws and replace old switch case with the new switch case.
4. Make electrical connections by removing one wire at a time from the old sensor and transferring it to the corresponding terminal on the new switch case.
5. Turn on gas and electrical power to the system. Check the system for proper operation. The pilot flame will heat the sensor sufficiently to close the (HOT) contact and allow the main burner to ignite when the thermostat calls for heat. Upon loss of pilot flame, the sensor will cool and transfer to the cold contact, which prevents the gas valve from being energized.

Replaces Flame Sensor Part Numbers:

3049-41 CAR304941 CAR30494

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