6 - 1
Electrical Diagnosis
Note: Begin with the unit unplugged, the water drained and the left side panel removed.
The following electrical parts can be tested for continuity using a multi-meter; hot tank thermostats,
cold thermostat and the compressor overload.
1. Set the multi-meter to audible for steps 1, 2 and 3. To test the manual reset and auto cutout
thermostats; contact one sensor probe on the upper terminal and the other on the lower terminal
of the same part (Figure 6-1-1 and 6-1-2). If there is continuity there will be an audible beep.
2. To test the cold thermostat position the sensor probes on the bottom two terminals of the cold
thermostat (Figure 6-1-3). If there is continuity there will be an audible beep.
3. To test the overload, connect one probe through the silver center and the other on the brass ter-
minal (Figure 6-1-4). If there is continuity there will be an audible beep.
Figure 6-1-1 Figure 6-1-2
Figure 6-1-3
Figure 6-1-4
Notice:
The information and/or procedures presented in the following demonstration(s) should be performed by a trained Water
Cooler Service Technician only.
Never attempt to service or repair a water cooler while it is plugged into any power supply.
Prior to any service or repair of the water cooler, ensure that the water has been completely drained from the system.
Electrical Component Diagnosis and Replacement