Microwave runs (light on, turntable rotating, fan running) but food does not heat up at all.
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.
Possible Causes
How to Fix / Troubleshooting
Critical safety warning: The high‑voltage system inside a microwave can be lethal. If you are not a trained technician, limit yourself to external checks and do not access or touch high‑voltage components.
- Step 1 – Confirm no heating: Place a cup of water in the cavity and run on full power for 1–2 minutes. If the water remains cold, there is no microwave output.
- Step 2 – Check power level settings: Ensure the power level is set to 100% and not a low setting or defrost mode.
- Step 3 – Listen for abnormal noises: A loud humming, buzzing, or crackling can indicate a failing HV component.
- Step 4 – Visual inspection (unplugged): Remove the outer cover and visually inspect the magnetron, HV transformer/inverter, capacitor, and diode for obvious damage such as burn marks or cracked casings. Do not touch or discharge the capacitor unless trained.
- Step 5 – Professional repair: A technician will test the HV components and replace the faulty magnetron, diode, capacitor, transformer, or inverter module with genuine Indesit parts.
Recommendation: Due to the danger, heating failures should be repaired by an authorised service centre.