Bradford White Water Heater M1TW50S6FCX

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.

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.

Burner Inspection and Air Shutter Adjustment

Ensure inner door and burner components are not hot before starting inspection

Inspect pilot flame for stability

Check that the main burner lights smoothly from the pilot

Verify main burner burns with a blue flame with minimal yellow tips

Ensure main burner is free from debris accumulation

Dip Tube Inspection and Replacement

Position on/off switch of gas control valve to 'OFF' position and unplug water heater from wall outlet

Turn off cold water supply to water heater

Connect hose to drain valve of water heater and route to an open drain

Open a nearby hot water faucet to vent heater for draining

Open drain valve of water heater and allow heater to drain to a point below the inlet connection nipple

Disconnect inlet nipple from plumbing system

Remove inlet nipple/dip tube from the water heater using an appropriate tool such as a pipe wrench

Visually inspect inlet nipple/dip tube for cracks and blockages

Blower Temperature Switch Testing

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

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

Locate blower temperature switch.

Is there continuity between the switch terminals using a multi-meter set to the ohms setting?

Do exhaust gas temperatures rise to or above 165°F?

Do switch contacts open when exhaust gas temperatures rise to or above 165°F?

Common causes for high exhaust temperature