Danby
No Heat – High Voltage System Failure
Microwave runs (light and turntable on, fan running) but food does not heat.
Advertisements
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.
Advertisements
Possible Causes
Failed magnetron, Defective high-voltage capacitor, Defective high-voltage diode, Failed high-voltage transformer or inverter board
How to Fix / Troubleshooting
Critical safety warning: The high-voltage section of a microwave can store lethal energy even when unplugged. Do not attempt to test or replace the magnetron, capacitor, diode, or transformer unless you are a trained technician with proper tools.
- Basic checks: Confirm you are using microwave-safe cookware and not running the unit empty. Test with a cup of water for 1–2 minutes.
- Listen and observe: If the unit sounds unusually quiet (no typical humming) or makes loud buzzing, note this for a technician.
- Power and settings: Verify that the power level is set to 100% (HIGH) and that you are not in a defrost or low-power mode.
- Next step: If the microwave still does not heat, internal high-voltage components are likely faulty. Due to the risk of electric shock and radiation leakage if shielding is disturbed, contact a qualified microwave service technician for diagnosis and repair.
Advertisements
Repair Difficulty
Professional Required
5/5
Advertisements