ErrorCodeDoctor
Panasonic Microwave H20 error code
The H20 error means your Panasonic combination steam microwave detected an open circuit in the steam heater. The steam heater is responsible for generating steam during steam cooking cycles. When an open circuit is detected in this component the steam function cannot operate. This requires inspection and repair by an authorised service centre.
Common causes
- Steam heater element has an open circuit or has burned out
- Wiring to the steam heater is disconnected or damaged
How to fix it
-
1
Stop using the microwave and unplug it
-
2
Contact a qualified technician to inspect and replace the steam heater
Related Panasonic Microwave error codes
Cooling
The cooling fan is running to cool down the internal components — not an error
Child Lock / Key Symbol / LOCK
Child lock is active — the control panel is disabled
D
Demo Mode is active — the microwave will not heat
E01
An internal fault was detected — the microwave requires service
H20 error — frequently asked questions
What does the H20 error mean on a Panasonic microwave?
The steam heater circuit has an open circuit fault
What causes the H20 error?
The H20 error is usually caused by: Steam heater element has an open circuit or has burned out; Wiring to the steam heater is disconnected or damaged.
Can I fix the H20 error myself?
This is rated a hard fix — it often requires tools, parts, or experience, and may be safer left to a professional technician.
How much does it cost to fix the H20 error?
Fixing the H20 error on a Panasonic microwave typically costs $100–$300, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my microwave with the H20 error?
We'd recommend addressing the H20 error before continuing to use the microwave, since hard-rated issues often involve a real fault rather than a minor glitch.