Re: electric stove / range

[http://dummy.us.eu.org/robert (Robert)]

https://www.consumerreports.org/appliances/microwave-ovens/should-you-repair-or-replace-broken-over-the-range-microwave-a1041440446/
has some ideas for whether to replace or repair.  By their estimate,
because the microwave is so old, they recommend replacement.  You'll have
to hire an electrician.  It might be better to use the same electrician
for both replacing the microwave and installing the 240V outlet into the
kitchen to save time.