Bradford White Water Heater EF100T1503XA2

Service Procedure I — Thermostat Circuit Testing

Unplug electrical power to the water heater

Check continuity of the wire harness to the sensor

Check sensor resistance against the temperature/resistance table

Restore power and run the heater through a heating cycle

Error code 65 (high water temperature)

Turn power off and draw water to cool the tank below 120°F

Check that the sensor is fully inserted into the well and its clip is undamaged

Service Procedure III — Burner Tube Inspection & Replacement

WARNING — Heater components can be hot during this procedure; take precautions to avoid injury.

Turn the main power switch off and unplug the water heater, then turn off the gas supply.

Remove the surround cover, then disconnect the gas connection, PVC venting, wire harness, and silicone tubing from the gas valve.

Disconnect the wire harness from the blower assembly.

Remove the two screws holding the hot surface igniter and flame sensor and carefully remove them (for Direct Spark Ignition models, remove the spark rod bracket screws and spark rod instead).

Remove the four nuts holding the burner transition, lift the blower/gas valve/transition assembly off, and set the gasket aside.

Remove the burner tube from the burner mounting insert.

Service Procedure XII — Intake Pressure Testing (models prior to serial "CF" only)

Check continuity through the normally closed intake pressure switch if the blower does not energize

Refer to the vent safety switch, exhaust pressure switch, or blower testing procedures if the intake pressure switch is not faulty

Check continuity through the switch if the purge LED does not illuminate within the expected time

Confirm the inlet tube pressure tap reads at least -1.2 in. W.C. using a manometer

Remove the hose from the intake pressure switch and restart the heater to see if the purge LED illuminates

Isolate the heater from the intake vent system and restart again to isolate a switch versus vent-system fault

Check whether the intake vent system is obstructed and clear any obstruction found

Call technical support if no cause is found

Service Procedure V — Blower Testing & Replacement

WARNING — 120-volt potential exposure; use caution making voltage checks.

Confirm the blower energizes when the thermostat calls for heat

Check for 120VAC across the terminal-block black and white wires

Check for 120VAC at the ignition module/control board and blower wiring

Repair or replace the harness or blower as indicated

Check if the blower energizes but seems weak

Check amp draw on the black blower-motor lead (should read 0.6–3.0 amps)

Confirm the blower wheel is secure on the motor shaft

Service Procedure IX — Spark Rod Gap Inspection and Adjustment (Direct Spark Ignition models)

Remove the combustion system per the Combustion System Removal procedure

Measure the spark gap between the spark rod and burner tube

Is the spark gap within the acceptable range of 3/16 in. to 1/4 in.?

Adjust the spark rod if the gap is out of range

Support the spark rod near the ceramic insulator with pliers

Bend the end near the burner tube with needle-nose pliers

Re-measure to confirm the gap is within 3/16 in. to 1/4 in. after bending

Reinstall the combustion system