Lochinvar EnergyRite ER402 - Manual (Page 23)

Table 3B Inlet/Outlet System Sensor Resistance vs. Temperature
Temperature Resistance
50 18,780
68 12,263
86 8,194
104 5,592
122 3,893
140 2,760
Checking temperature sensors
The pool heater temperature sensors (inlet and outlet water) are both resistance type devices. The following table shows the
correct values for the sensors at various temperatures. Use an ohmmeter to read the resistance of the sensor at a known
temperature. If the resistance of the sensor does not closely match, replace the sensor.
3
Troubleshooting
(continued)
Service Manual
23