My best appliance repair resource is Galvin Appliance in Albany, (510) 527-2244.
They are great at fixing all kinds of stuff, even if you didn’t buy it there. I recently referred them to a client whose great old vintage stove needed help, and she wrote back to me: “Derek from Galvin not only ordered and installed a new heating element into our ancient wall oven, he used the old one in the lower oven and got it working after being out of commission for many years, thus saving us a bundle of money!”