Frigidaire Range Surface Element Stuck On: Troubleshootin... | appliancefaults.com

Technical Background:

The main control unit (MCU) or electronic range control (ERC) sends voltage to a relay that controls power to the surface element. When the user selects a heat setting, the MCU energizes the corresponding relay. A stuck or shorted relay, or a faulty MCU, can cause the element to remain on continuously, overriding the switch's off position.

Symptoms:

The Frigidaire range has a surface element that stays on high heat regardless of the knob position. The element won't turn off even when the knob is in the 'off' position, creating a safety hazard.

Possible Causes:

Stuck or welded relay on the control board.
Faulty surface element switch.
Short circuit in the wiring harness to the element.
Malfunctioning electronic range control (ERC) or main control unit (MCU).
Damaged element receptacle.

Solution:

1

Disconnect power to the range at the breaker panel. Verify no voltage is present at the range receptacle using a multimeter.
2

Remove the range top to access the surface element wiring and switches. Typically requires a 1/4-inch nut driver.
3

Disconnect the suspected element from the wiring harness.
4

Check the element receptacle for any signs of damage or shorting. Replace if necessary.
5

If the element remains on after disconnecting, the problem is likely the relay or the control board. Locate the control board (ERC/MCU).
6

With the element disconnected but power restored (exercise extreme caution!), test the voltage at the element connection point on the control board with the element switch in the OFF position. A reading above 0V AC indicates a faulty relay or MCU.
7

Replace the control board. Ensure the new board is the correct part number for the range model.

Safety Warning:

Disconnect power to the range at the breaker before attempting any repairs. Use proper Lock-Out/Tag-Out (LOTO) procedures to prevent accidental energization. High voltage is present in the range; exercise extreme caution when testing components with power applied.

Prevention:

Avoid using excessive force when turning the element control knobs. Periodically inspect the element receptacles for damage or corrosion. Ensure the range is properly grounded.

Expert Tip:

Some Frigidaire ranges have a diagnostic mode. Consult the service manual for your specific model to access the service mode. This can help you pinpoint the exact source of the problem or show error codes related to the surface element controls.

Frequently Asked Questions

•How do I access the control board on my Frigidaire range?

The control board location varies by model. Typically, it's behind the control panel or underneath the range top. You may need to remove screws from the back or sides of the range to access it. Consult your range's service manual for specific instructions.

•Where can I find the correct replacement control board for my range?

You can find replacement control boards at appliance parts retailers online or at local appliance parts stores. You will need the model number of your range to ensure you get the correct part. Always use the manufacturer's recommended replacement part.

•How do I test the surface element switch?

Use a multimeter set to continuity. With the switch disconnected, check for continuity between the terminals in the 'off' position. There should be no continuity. Then, check for continuity in the various 'on' positions. Continuity should be present in each of the 'on' positions. If the switch shows continuity in the 'off' position, it's faulty and needs replacement.

Frigidaire Range Surface Element Stuck On: Troubleshooting and Repair

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the control board on my Frigidaire range?

•Where can I find the correct replacement control board for my range?

•How do I test the surface element switch?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: