Err4 Haier washing machine error Err4 — heating fault
Medium severity
What it means
If your Haier washing machine shows Err4: the appliance cannot heat the water to the selected temperature.
Likely causes
Burnt-out heating element, heavy limescale on the element, faulty temperature sensor or wiring, relay on the control board.
Safe steps you can try
Unplug for a few minutes, plug back in and repeat the program. Watch out for low mains voltage.
When to call a technician
If the error returns, the heating element and temperature sensor must be tested with a multimeter.
Haier — Washing machine error codes
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