20
120 volt potential exposure. Isolate the
appliance and reconfirm power is disconnected
using a multi-meter.
WARNING
Service Procedure I:
Thermostat Circuit Testing and Replacement
ThermostatSensor(Thermister)ReplacementProcedure
Step 1.
Position main power switch to “OFF”
Step 2.
Disconnect (unplug) water heater from 120 volt power
source.
Step 3.
Un-latch and remove top surround cover from top of
heater.
Step 4.
Disconnect temperature sensor from control (see photos below).
Step 5.
Unclip sensor from well and pull sensor to remove, do not remove well (see picture).
Step 6.
Install new sensor assembly into well and reinstall senor clip.
Step 7.
Reconnect the sensor connector to the control board and route the wire harness
through the same path that it was removed.
Step 8.
Restore 120 volt power supply and water supply to water heater, check and repair any leaks found. Confirm
proper operation following the lighting instructions on the lighting instruction label or the lighting instruction
located in the installation and operating instruction manual.
Step 9.
Replace surround cover on top of heater.
Sensor clip sown
properly installed
Sensor shown fully inserted
into well
Disconnect sensor
harness from
control board
20
