Bradford White eF Series Troubleshooting Manual And Instructions For Service page 28

Thermostat Circuit Testing and Replacement
Thermostat Sensor (Thermister)
Replacement Procedure
1. Position main power switch to OFF.
2. Disconnect (unplug) the water heater from 120
volt power source.
3. Unlatch and remove the top of the surround
cover from the top of the water heater.
4. Fold back the insulation just in front of the
burner to expose the temperature sensor (see
image at right).
5. Disconnect temperature sensor from harness
(see images at right).
6. Direct Spark Ignition Models: Unclip the
sensor from the well and pull the sensor to
remove, do NOT remove the well.
7. Hot Surface Ignition Models: Apply thread
sealing tape or applicable thread lubricant to
threads of new sensor. Install new thermostat
sensor and connect to the wire harness from
step 6.
Direct Spark Ignition Models: Install the new
sensor completely into the well and reinstall the
sensor clip.
8. Fold the insulation back into place. Be sure
there are no wires in contact with the burner.
9. Restore 120 volt power supply and water supply
to the water heater, check and repair any leaks
found. Confirm proper operation following the
lighting instruction label or the lighting
instruction located in the Installation and
Operating Instruction Manual.
10. Replace the surround cover on the top of the
water heater.
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Service Procedure I
120 volt potential exposure. Isolate the appliance and
reconfirm power is disconnected using a multi-meter.
WARNING
Direct Spark Ignition Models
Insulation folded
back to expose
temperature sensor
Sensor shown fully
inserted into well
Sensor clip shown
installed properly
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