In a word -DON'T
Called to repair a combo micro/oven. Oven not heating. Rstored heat. Then miraculously the mw malfunctions, while here. I was told they would not come back because they don't work on microwaves. Really-then you should not work on combos. Loud,argumentative and unprofessional. Don't waste your money at best - it is a gamble w/ no intent to make it right.