Model 66512694. Keeps tripping breaker. Had electrician switch to different breaker and still the same problem. Took back panel off and I have no broken or burnt wires. No arch marks. Checked parts and all are fine. Continuity through element and have taken element out and looked at it and it seems fine. It runs for 8-10 minutes then trips breaker. Link is all clean and no blockage in hose. even tan with vent hose off and does the same. Any help, please?