GE GTWS8650DWS Training Manual page 55

Pressure Sensor
For models equipped with a pressure
sensor, the pressure sensor status will be
determined by reading the pressure
sensor's frequency.
If the pressure sensor's frequency is
outside of the "Valid Values" then an
error condition is set. The error
condition will be logged in Service mode.
If Pressure Sensor Error occurs during
cycle, the cycle will be canceled and the
control should go to Idle.
If a cycle is started during a pressure
sensor error, the Fill cycle will be
cancelled.