Bradford White Water Heater EF100T150E3N2

Service Procedure VIII — Flame Sensor Testing & Replacement

Be cautious of 120-volt potential exposure and hot flame sensor

Check for a minimum of 1 microamp during the 1.5-second flame-proving period

Is the flame-sensing circuit okay?

Check for expected 24VAC at ignition module/control board flame-establishing terminals

Is 24VAC present at the terminals?

Call technical support if 24VAC is absent

Service Procedure XIV — Anode Inspection and Replacement

Turn off the water supply and drain the water heater

Disassemble the heater for access to anodes and flue baffles

Locate and remove the anode rods using a 1-1/16 in. hex socket

Visually inspect each anode rod for depletion

Apply thread sealing tape or compound and reinstall the anode rods

Restore the water supply and check for leaks

Reinstall the collector insulation and control panel

Service Procedure I — Thermostat Circuit Testing

Error code 32: Unplug electrical power to the water heater

Check continuity of the wire harness to the sensor

Is the resistance close to 0 ohms?

Replace the harness if resistance exceeds 0.5 ohms or wires show damage

Check sensor resistance against the temperature/resistance table

Restore power and run the heater through a heating cycle

Verify proper operation by viewing sensor temperature when the burner shuts off

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 II — Combustion System Testing

Observe burner operation through the sight glass

Verify minimum gas supply piping size

Confirm static inlet gas pressure is stable between 7 and 14 in. W.C.

For models with Hot Surface Ignition

Confirm the inlet gas pressure does not drop more than 2 in. W.C. during ignition

Check that the igniter glows through the sight glass during warm-up

Check for 120VAC at the ignition-module igniter terminals

Check igniter cold resistance is under 150 ohms