Finish Thompson BE-15/15C - Manual (Page 28)

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Possible Cause 5: Stuck/faulty Divert Solenoid Valve.
Determine whether the Divert Valve is stuck between two positions. During normal operation, the Distillate
Piping is open and at atmospheric pressure during the water process. Once the glycol process begins, the
Divert Valve switches positions to allow the Distillate Piping and the Process Tank to be under up to -28” Hg.
of vacuum.
 If the unit “belches” while filling the Process Tank or reads a partial vacuum during the water process, the
Divert Solenoid Valve is stuck between two positions. A stuck Divert Valve can allow air to enter
through the Processed Water Hose during the vacuum portion of the cycle.
Refer to the “Service Procedures: Divert Valve Repair or Replacement” section of this manual for further
instruction on servicing the Divert Valve.