Bradford White Water Heater M2TW50T6FBN

Burner Inspection and Air Shutter Adjustment

Check for debris accumulation on the main burner

Verify pilot flame fully engulfs spark/flame sensor

Ensure main burner lights smoothly from pilot

Check main burner flame color for blue with minimal yellow tips

Verify water heater vent length is within allowable limits

Check gas pressure is within specification

Position power switch on gas control to the “OFF” position.

Remove the three screws from control access cover on blower assembly and remove cover.

Carefully remove pressure switch from blower housing.

Disconnect wire leads from pressure switch.

Use a multi-meter set to the ohms setting and check across pressure switch terminals with blower off.

Are switch contacts open? (no electrical continuity)

Position gas valve power switch to the “ON” position and adjust thermostat to call for heat.

Position gas control power switch to the “OFF” position and unplug heater from wall outlet.

Turn off gas supply to water heater.

Remove outer jacket door and slide inner door open from left to right.

Disconnect pilot tube (7/16 wrench) and feedline (¾ wrench) from gas control.

Disconnect igniter/flame sensor wire from gas control.

Remove burner assembly from combustion chamber.

Thoroughly inspect burner surface area and burner port area and remove any loose debris.

For cast iron burners, inspect for any debris build up inside burner casting.

Pilot Inspection, Testing and Replacement

Position gas control power switch to the “OFF” position and unplug heater from wall outlet.

Turn off gas supply to water heater.

Remove outer jacket door and slide inner door open from left to right.

Disconnect pilot tube nut (7/16 wrench) and feedline nut (¾ wrench) from gas control.

Disconnect igniter/flame sense wire from gas control.

Remove burner assembly from combustion chamber.

Remove pilot assembly from feedline (¼" nut driver).

Visually inspect igniter/flame sense wire for damage. Replace pilot if damage is found.

Remove three screws from control access cover on blower and remove cover

Is there 10 to 13 VAC between red wire leading to blower temperature switch and green ground wire?

Is LED on gas valve flashing the “heartbeat” code (alternating bright/dim)?

Is there 10 to 13 VAC between yellow wire leading from pressure switch and green ground wire?

Is there continuity through blower temperature switch?

Check for loose or broken wire connection at switch terminals

Do you hear or can you see the igniter sparking?