E5
Haier Internal Control Board Error / Watchdog Reset

Oven displays E5 and may not respond to touch or may reboot intermittently.

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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

Defective microcontroller on control board, Power supply instability on control PCB, Software corruption, Overheating of control area due to blocked vents

How to Fix / Troubleshooting

Safety first: Disconnect power at the breaker before accessing the control panel.

Step-by-step checks:

  • Power cycle: Turn off power for 10 minutes, then restore. Observe if E5 returns immediately or only after heating.
  • Check control ventilation: Ensure that the area around the control panel is not blocked and that internal cooling fans (if present) are operating.
  • Inspect board: Remove the control panel and inspect the board for signs of overheating, cracked solder joints, or bulging capacitors.
  • Check mounting: Ensure the board is securely mounted and not flexing, which can cause intermittent faults.

When to replace parts: Persistent E5 usually requires replacement of the electronic oven control board. Software-related issues may require a factory-programmed board.

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Repair Difficulty

Hard 4/5

Required Part

Electronic Oven Control Board
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