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1.4 Replacing a High-Limit Thermostat
1. Remove the filter pan and lid from the unit. Drain the frypots into an McDonald’s Shortening
Disposal Unit (MSDU) or other appropriate METAL container using the computer “drain to pan
option” or using the MIB board in manual mode.
DANGER
DO NOT drain more than one full frypot or two split frypots into the MSDU at one time.
2. Disconnect the fryer from the electrical power supply and reposition it to gain access to the rear of
the fryer.
3. Remove the four screws from both the left and right sides of the lower back panel.
4. Locate the high-limit that is being replaced and follow the two-black wires to the 12-pin connector
C-6. Note where the leads are connected prior to removing them from the connector. Unplug the
12-pin connector C-6 and using a pin-pusher push the pins of the high-limit out of the connector.
5. Carefully unscrew the high-limit thermostat to be replaced.
6. Apply Loctite
™
PST 567 or equivalent sealant to the threads of the replacement and screw it
securely into the frypot.
7. Insert the leads into the 12-pin connector C-6 (see illustration below). For full-vat units or the left
half of a dual-vat unit (as viewed from the rear of the fryer) the leads go into positions 1 and 2 of
the connector. For the right half of a dual-vat unit (as viewed from the rear of the fryer), the leads
go into positions 7 and 8. In either case, polarity does not matter.
8. Reconnect the 12-pin connecting plug C-6. Use wire ties to secure any loose wires.
9. Reinstall the back panels, contactor plug guards, reposition the fryer under the exhaust hood, and
reconnect it to the electrical power supply to return the fryer to service.
1.5 Replacing a Temperature Probe
1. Lift the element out of the oil.
2. Disconnect the fryer from the electrical power supply and reposition it to gain access to the rear of
the fryer.
3. Remove the four screws from both sides of the lower back panel. Then remove the two screws on
both the left and right sides of the back of the tilt housing. Lift the tilt housing straight up to
remove from the fryer.