Use a Hertz meter to read 
the Hertz at specified water 
levels.  
For testing at the pressure 
sensor, the pin out is as 
follows: 
   1 = Ground 
    2 = Signal 
    3 = 5V 
With that, you would want to 
test between pins 1, & 2, to 
measure the signal. 
1. Remove control 
panel  
2. Compress the 
locking tab holding 
sensor in its housing. 
3. Disconnect the sensor 
connector and air 
pressure hose. 
Removing the Pressure Sensor 
Pressure Sensor 
  
Testing