E14
Westinghouse Internal Power Supply / Control Board Fault

Microwave shows E14 and the clock resets intermittently or the unit shuts off randomly.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Failing low-voltage power supply on control board,Loose control board connectors,Intermittent line filter connection,Defective transformer on control PCB

How to Fix / Troubleshooting

Safety first: Unplug the microwave before removing the control panel or accessing internal wiring.

User-level checks:

  • 1. Confirm stable power: Plug the microwave into a known-good outlet. Avoid power strips and surge protectors that may be faulty.
  • 2. Observe behavior: Note if the unit shuts off when using specific functions (e.g., high power, fan) which may indicate internal power stress.

Advanced steps:

  • 3. Inspect control board connections: Remove the control panel and reseat all connectors to the main PCB.
  • 4. Visual inspection: Look for bulging capacitors, burnt resistors, or discoloration on the control board.
  • 5. Replace control board: If E14 persists and visual signs of failure are present, replace the main control board.

Because this involves live-voltage circuitry, board replacement should be done by a qualified technician.

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Repair Difficulty

Hard 4/5

Required Part

Main Control Board
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