Haier Overheating electrical components or new-appliance off-gassing

Microwave emits unusual odors (chemical or electrical) without visible smoke

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.

Possible Causes

New unit burning off manufacturing residues, Overheating wiring or control board, Food residue on heater (for grill/combi models)

Safety: If the smell is strong and resembles burning plastic or wiring, unplug the microwave immediately.

New appliance: For a new Haier microwave, run it empty (if manual allows) or with a cup of water for several short cycles to burn off residues. Odor should diminish.
Inspect interior: Look for spilled food or packaging stuck near the grill element or cavity walls.
Persistent electrical smell: If odor persists or worsens, discontinue use and have a technician inspect internal wiring and the control board.

Medium 3/5

Internal Wiring / Control Board

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