Bradford White Water Heater M4TW40T6FBN

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.

Position gas control power switch to 'OFF' position

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

Carefully remove pressure switch from blower housing

Disconnect tubing from pressure switch

Disconnect yellow wires from pressure switch

Reconnect wires to new pressure switch

Reconnect tubing to new pressure switch

Carefully position pressure switch into blower housing

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

Unplug blower power cord from wall outlet.

Disconnect vent system from exhaust adapter on top of blower.

Remove exhaust adapter from blower and retain for use on new blower.

Remove the three blower mounting screws.

Remove blower with gasket from water heater.

Blower Temperature Switch Replacement

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

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

Locate blower temperature switch.

Disconnect red and yellow wire leads from switch.

Snip the retaining lug from the blower housing to allow removal of temperature switch.

Remove switch from blower housing.

Install new switch ensuring it is properly seated in mounting area.

Reconnect red and yellow wires to new switch.

Remove Blower To Gain Access To Flue Baffle

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

Disconnect vent system from exhaust adapter on top of blower.

Remove the three blower mounting screws using a ¼" nut driver.

Remove blower with gasket from water heater.

Remove flue baffle from Heater.

Inspect baffle for deterioration, missing restrictors, and clean any scale or debris build up. Replace with new baffle as necessary.

Reinstall baffle into flue tube ensuring baffle hanger tab are inserted into notch location at the top of the flue tube.