Troubleshooting the E5 Oil Too Hot Error Code

Overview

The E5 Oil Too Hot error occurs when the temperature reading from the main temperature probe reaches or exceeds 425°F (218°C). This is a software high limit designed to shut down the fryer if a heat contactor is stuck on to avoid continued temperature rise. It can also occur due to a temperature probe giving a false reading above 425°F (218°C).

Call Avoidance

To help the end user resolve the issue without a service call:

1. Have the end user drain the oil.

2. Remove any debris covering the probes or anything touching the probes.

3. Verify Temperature probe is not exceeding past the guard.

Field Troubleshooting

If call avoidance steps do not resolve the issue, proceed with the following field troubleshooting steps.

Recommended Parts:

• Temperature probe

• Heat contactor

• Control board

Recommended Tools:

• Basic hand tools

• Thermometer

• Multimeter

• Small flat tip screwdriver

• 3/8 in. socket or wrench

• 1/2 in. wrench

Troubleshooting

1. Verify Oil Temperature: Use an independent thermometer to check the oil temperature.

• Above 425°F (218°C): Troubleshoot for a sticking heat contactor or a stuck relay on the control board. Remove one of the coil voltage wires from the contactor to see if it opens. If it remains closed, replace the contactor. If it opens and closes again when connected (and no call for heat), this indicates a stuck relay on the control. Replace the control in this circumstance.

• Below 425°F (218°C): Troubleshoot for a temperature probe error or a control board issue. Disconnect the temperature probe wires from the control board and take a resistance reading. Compare this reading with the temperature probe chart. If the probe is faulty, replace it. If the probe tests good and is securely connected to the control board but the E5 error persists, replace the control board.

2. For intermittent E5 errors: Follow the same process to check the temperature probe and control board. If the temperature probe provides a consistent OHMs value and the problem persists, replace the control board.