Timer
starts
countdown
but
no microwave
oscillation.
(No heat while oven lamp and fan motor turn on.)
Oven can program
but timer
does not start.
Microwave
output
is low. (Oven takes
longer
time to cook food.}
Fan motor
turns
on when p_ugged
in.
Oven does not operate
and return
to the pmugged in mode.