Drain the fryer. Cleaning the kettle will make things easier. Remove the thermostat knob and remove the two screws that hold the thermostat. Remove the two wires. Under the kettle you will see a double headed bolt with a tiny stainless tube running through them. Make sure that you do no confuse the one for the thermostat with the one for the high limit. Loosen or completely unscrew the small inner nut. Unscrew the large outer nut. Inside the kettle, locate the sensor bulb that corresponds to the thermostat. Remove the bracket and vertically straighten the sensor bulb. From under the kettle pull the sensor bulb and wire down and remove thermostat. Clean the fitting where you removed the bulb. Replace with new thermostat in reverse order. Avoid sharp bends in the sensor wire. Use Teflon tape on the large nut. The small nut is a compression fitting and does not need Teflon tape. Reclamp the sensor bulb and pull excess tubing from the kettle before tightening the small nut. Be careful not to cross thread the nuts. Do not over tighten the small nut. Refill the fryer and check for leaks.
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Drain the fryer. Cleaning the kettle will make things easier. Remove the thermostat knob and remove the two screws that hold the thermostat. Remove the two wires. Under the kettle you will see a double headed bolt with a tiny stainless tube running through them. Make sure that you do no confuse the one for the thermostat with the one for the high limit. Loosen or completely unscrew the small inner nut. Unscrew the large outer nut. Inside the kettle, locate the sensor bulb that corresponds to the thermostat. Remove the bracket and vertically straighten the sensor bulb. From under the kettle pull the sensor bulb and wire down and remove thermostat. Clean the fitting where you removed the bulb. Replace with new thermostat in reverse order. Avoid sharp bends in the sensor wire. Use Teflon tape on the large nut. The small nut is a compression fitting and does not need Teflon tape. Reclamp the sensor bulb and pull excess tubing from the kettle before tightening the small nut. Be careful not to cross thread the nuts. Do not over tighten the small nut. Refill the fryer and check for leaks.