Pro H50/55-Series Gas Fryers Service and Parts Manual - Frymaster

1.6.2 Replacing the Temperature Probe or High-Limit Thermostat
1. Disconnect the fryer from the electrical supply.
2. Drain cooking oil below the level of the probe or thermostat.
3. Lift up on the bezel to disengage the tabs on its lower edge from the control panel frame. Slide
the bezel down to disengage the upper tabs. Remove the top two screws. Swing the controller out
from the top and allow it to rest on its hinge tabs.
4. Disconnect the controller wiring harness and ground wire from the back of the controller and
remove the controller by lifting it from the hinge slots in the control panel frame.
5. If the fryer has a built-in filtration system, remove the cotter pin securing the oil return handle to
the oil return operating rod and separate the rod from the handle.
6. Disconnect the ignition cables from the ignitors by grasping the boots and gently pulling toward
you.
7. Disconnect the flame sensor wires from the flame sensors.
8. Disconnect the sound device lead from the interface board.
9. If working on the left frypot, cut the wire tie on the wiring bundle and disconnect the main
wiring harness 15-pin connector.
10. Remove the component box mounting screws.
11. Rotate the top of the component box out of the frame and carefully pull it out enough to
disconnect the wiring harness plug from the back of the box. If the unit is equipped with built-in
filtration, disconnect the wires from the filter switch. This will leave one set of wires, enclosed
in spiral wrap, connected to the component box.
12. Remove the box and place it on top of the fryer to expose the temperature probe and high-limit
thermostat.
13. Cut the leads of the probe or thermostat, as appropriate, near the component and unscrew it from
the frypot.
14. Unscrew and remove the temperature probe (or high-limit thermostat) from the frypot.
15. Apply Loctite ® PST56765 pipe thread sealant or equivalent to the replacement part threads and
screw the replacement part into the frypot, torquing to 180 inch-pounds.
16. Connect the wires from the new component as follows:
a. If replacing the temperature probe, use a pin pusher to disconnect (one at a time) the red and
white leads from the connector and insert the corresponding leads from the new probe.
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