H12
Panasonic
Heater Relay / Power Control Fault
H12 appears and the cooker may heat erratically or not at all.
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
Stuck or failed heater relay, Faulty triac or power transistor on PCB, Loose mains input connector, Damaged control PCB
How to Fix / Troubleshooting
Safety first: Disconnect from mains. Internal components are at line voltage.
- Power reset: Unplug for 10 minutes and retry. If H12 returns, internal power control is likely faulty.
- Inspect mains connectors: Remove the bottom cover and check the AC input terminals and wiring to the main PCB. Tighten any loose connectors.
- Check for burn marks: Examine the main PCB around the heater relay or triac. Burnt or cracked components indicate failure.
- Component-level repair: Replacing individual relays or triacs requires soldering skills and correct part identification (e.g., Panasonic-specified relay). In most home repairs, replacing the entire main control PCB is recommended.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Main control PCB
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements