Bradford White eF Series Troubleshooting Manual And Instructions For Service page 26

Thermostat Circuit Testing and Replacement
Thermostat Sensor (Thermistor) Replacement Procedure
1. Position main power switch to "OFF."
2. Disconnect (unplug) water heater from 120 volt power source.
3. Unlatch and remove top surround cover from top of the water heater.
4. Fold back insulation by top outlet location to expose temperature
sensor.
5. Disconnect temperature sensor from control board (see images below).
6. Unclip sensor from well and pull sensor to remove, DO NOT remove well.
7. Install new sensor completely into well and reinstall sensor clip.
8. Connect temperature sensor to control.
9. Fold insulation back into place. Be sure there are NO wires in contact with burner.
10. 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 instructions located in the
Installation and Operating Manual.
11. Replace the surround cover on the top of the water heater.
Disconnect sensor harness
from control board
26
Service Procedure I
WARNING
120 volt potential exposure. Use
caution making voltage checks to
avoid personal injury.
Sensor clip shown
properly installed
26