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Model Number
SEC302BS
What have you tried so far?

Turned circuit breakers back on . Clock works,control panel lights up, same default code F34

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Jim, the F34 code means the fan is running at an incorrect high or low speed. This error code indicates a motor issue. If you replaced both exhaust fans you may have a voltage issues coming from the board. So you either have a bad exhaust motor or board issue. The next step is to check power to each exhaust motor if incorrect voltage from nameplate voltage on motor replace the power board. Matt Ace technician

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