Oven unit blew 20 amp mag fuse, replaced fuse. door switches tested OK. relays working OK. mag amp draw 16.4 amps, good. previously there were terminals replaced on t.v. circuit which could be causing the issue. also could have wiring problems for the low voltage wires to the door switches. spoke with Trevor at Turbo Chef and he recommended replacing the cap for the k3 relay. will order wiring harnesses and cap and return. 8/27/20 Came in and installed new wire harness, harness and capacitor assembly. tested the unit and found fuse OK. checked mag circuit and door switch, tested OK. ran the unit and operation OK.