Panasonic HL-MX465B microwave

[alternativeGeorge]

Does anyone know the key sequence required to clear the H98 fault code on this machine ? All cooking functions are locked out until this fault code has been cleared.
Presumably the reset sequence is detailed in the service manual if anyone has access to this ?

[electrofix]

I would look at the door switches first after looking at google posts

I dont know of any reset sequences unless you have put the child lock by mistake ( if its got one )

Dave

[alternativeGeorge]

There are some Panasonic service manuals online and they typically describe this issue as follows :-

“H97 and H98 error code display –
“If 3 times H97 or 2 times H98 exist, microwave oven can not be used any more, even if the defective parts have already been replaced
“How to reset for the service – please take the following steps
” 1. Plug in oven
” 2. Press Stop/Reset pad once
” 3. Open the door
” 4. Press the Start pad for more than 2 seconds until buzzer beeps
” 5. Press the Stop/Reset pad 3 times (oven will show total magnetron usage time)
” 6. Press the power level pad (oven will show total number of H97 and H98 occurrences)
” 7. Press the Start pad for more than 2 seconds until buzzer beeps to reset
” 8. At end of reset buzzer beeps and display shows EEPEND

My combination microwave does not have a conventional keypad and has instead an electronic display with touch keys.
There are no equivalent pads/touch_keys on the display so can’t replicate the sequence show above !e tried

I have been unable to find the corresponding sequence by trial and error and feel that I need to find someone who can access the service manual for this model.

[electrofix]

there are lots of service manuals here but only a user manual for yours

you may find another one thats similar but it will take some work

https://www.manualslib.com/brand/panasonic/microwave-oven.html

Dave

[alternativeGeorge]

Thanks Dave, that’s where I found some reset sequences for other models. Unfortunately none of them have a touch pad control panel.

Where could I get a service manual for the HL-MX465B or at least the bit with the reset sequence ? Where do microwave service engineers go for this information ?

[electrofix]

well I service microwaves but I dont think i could get access to tech unless i became a panasonic tech partner

being a microwave makes it worse as there are lethal voltages on the mag. The manufacturers argue that if they tell you howe to do it and you hurt yourself then they may be liable

Dave

[alternativeGeorge]

As an engineer, I’m well aware of the dangers and precautions associated with microwaves. In my case, I have already replaced the magnetron which had a melted antenna.
I can understand that Panasonic would want to lock out the microwave function to prevent further damage, but their design is poor because it also locks out the fan oven and grill functions which are not affected by the H98 fault.
It sounds as if I need to find a tame microwave engineer who is also a Panasonic tech partner ?
I can’t find one in Edinburgh !

[electrofix]

its all down to proving competance and thats hard to do without taking qualifications

years ago I had to go on a microwave course to allow me to get spares for electrolux and zanussi microwaves. I knew more about the high voltage working than the instructor but it gave me access to the parts I needed

I have not hit a locked out panasonic yet and have done lots of them. the time will come i am sure

Dave

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