H99
Panasonic
Inverter / Compressor Start Failure
Display shows H99, refrigerator does not start cooling after power-on
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
Severe inverter PCB fault, Shorted compressor, Incorrect voltage supply, Damaged harness between main PCB and inverter
How to Fix / Troubleshooting
Warning: High-voltage and sealed system components are involved. Non-professionals should limit work to basic checks.
- Step 1 – Verify supply voltage: Confirm the outlet provides stable voltage within the range specified on the rating label.
- Step 2 – Inspect wiring: With power disconnected, check the harness from the main PCB to the inverter and from inverter to compressor for burns or loose connectors. Reseat all plugs.
- Step 3 – Power reset: Unplug for 10–15 minutes, then reconnect. If H99 appears immediately and the compressor does not attempt to start, the inverter or compressor is likely defective.
- Step 4 – Professional diagnosis: A technician should test compressor windings and inverter outputs. Replacement of the inverter PCB or compressor may be required.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Inverter PCB Module
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements