On 30/10/2020 08:52, Mike Halmarack wrote:
A very old friend, my Sharp combination microwave, convection oven and
grill lost functionality last night. Currently the grill heats as
usual, the fan blows and the turntable rotates but neither the
convection oven nor the microwave produce any heat.

The grill, and convection mode heating are both resistive heaters.

I am slightly surprised if the grill is working that it doesn't also
generate some lower heat in the convection oven mode.

The microwave unit is entirely separate and has some seriously lethal
voltages available on capacitors in its circuitry. If you need to ask
the question above then delving into it is highly inadvisable.

When working do they share the same heat source?

I looked at some YouTube videos showing an "easily fixable" fuse
problem but these videos are about simpler machines.

I changed the turntable drive motor a couple of months ago with quite
pricey spares, so I feel quite committed to keeping this model going.
If they do share the same heat source I'd be more encouraged to delve.

I think it has probably become Wee scrap.

--
Regards,
Martin Brown