Replacing the High Temperature Limit Control (Gas Units)

The high temperature limit control is a safety, manual reset control that senses the temperature of the oil. If the oil temperature exceeds 425°F (218°C), this switch will open and shut off heat to the vat. When the temperature of the oil drops to a safe operation limit, the control must be manually reset by pressing the red reset button. The red reset button is located under the control panel, in the front of the fryer. This will allow heat to be supplied to the vat once again.

Before replacing a high temperature limit control, check to see that its circuit is closed.

Checkout

To avoid electrical shock or property damage, move the power switch to OFF and disconnect power.

1. Remove electrical power supplied to fryer.

2. Remove the control panel.

   

3. Remove the two nuts securing the high limit bracket to the unit and pull the bracket from the unit.

4. Remove the two screws securing the high limit to the bracket.

5. Remove the high limit from the bracket.

6. Remove the two electrical wires from high temperature limit control.

   

7. Manually reset the control, then check for continuity between the two terminals after resetting the control.

   • If the circuit is open, replace the control and continue with procedure.

   • If the circuit is closed, the high limit is not defective, and reconnect the two electrical wires.

Replacement

To avoid electrical shock or property damage, move the power switch to OFF and disconnect power.

1. If the tube is broken or cracked, the control will open, shutting off electrical power to the heat circuit. The control cannot be reset, and it will continuously click when pushed.

2. Drain the oil from the vat and discard. A substance in the tube could contaminate the oil.

3. Remove the control panel.

   

4. Loosen small inside screw nut on capillary tube.

   

5. Remove the bracket form the heat tube covering the high limit bulb.

6. Straighten the capillary tube behind the vat wall.

7. Pull the high limit bulb through the retainers on the heat tube.

8. Remove the larger outside nut that threads into the vat wall.

9. Remove the defective high limit from the control panel area.

10. Insert new high limit bracket and replace wires.

11. Uncoil capillary line, starting at capillary tube, and insert through vat wall.

12. Insert capillary line through brackets on heat tube. Pull back through vat wall until capillary bulb is secure in brackets.

13. Pull excess capillary line from vat and tighten nut into vat wall.

14. With excess capillary line pulled out, tighten smaller nut.

15. Replace bracket on heat tube covering the high limit bulb.

16. Replace front panel.

17. Refill vat with oil.

18. Fryer is now ready for operation.