convection over range microwave oven lost heat convection only
Lost heat ONLY in convection oven. Microwave works fine It’s a GE profile PVM9179DFBB
Does the fan come on when you turn on convection heat?
If not it may be the control circuit for the convection heat has a bad relay or wiring problem.
If the fan still works then the heating element for convection function is likely burnt out and will require replacement I expect.