How To Fix Microwave ?


This is intended for technicians or with enough knowledge in electrical and electronics only.

Microwave stores high voltage in capacitor and can injured or kill.

A. Issue not heating

  • check door switches (primary and secondary)
  • check primary winding getting 120v from control
  • check diode and capacitor
  • check thermal fuse
  • check magnetron ( should be less than 1 ohms both terminal and each terminal must not be grounded to the unit. ( replace or repair faulty parts.

B. Microwave No power

  • check power going to unit ( Make sure there is power going to the unit)
  • check fuse (replace if bad)
  • check door switch ( replaced shorted or damage switch)
  • check control board make sure power is going to the main pcb

C. Microwave Noisy

  • Start microwave and Observe noise
  • Unit may disassembly unit to find the source of noise and internal inspection
  • disconnect power to unit
  • repair or replace faulty parts causing the noise

D. Touchpad short error

  • unplug unit
  • disconnect touch pad
  • if error persisted with touchpad disconnected ( replace control board otherwise replace touchpad

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