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Re: Thermador SEC301BB/03 F34

Posted By: Fritz Date: 7/1/2025 6:34 p.m. EST

In Response To: Re: Thermador SEC301BB/03 F34 (Fritz)

it appears the issue was/is the panel breaker as well as a Molex pin seating on the relay board.
I had found that the supply voltage to the HE is 18vDC and the signal voltage is 2vDC.
Measured them on the board side of the Molex. Someone suggested cheking the Molex pin for seating and tension.
The signal pin was loose in the connector body.
Then checked the volts again, never failed, but the oven still gave F34 and shut off @~40s.
Since I had changed out the relay board, it got me thinking.

So just for s&gs, I unmounted the breaker to check for any rust or visible oxidation on the buss bar or breaker clips and terminal screws, as the basement isn’t exactly the least humid place & dust free in the house.
Then I loosened the terminal screws a half turn and tightened them back up a full turn. Haven’t had any issues for 9 days.
The breaker is at least as old as the oven install, 20. So I may replace the breaker just cause.

Finally, home baked bread again.

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