Replacing the Flame Sensor in a Gas Dryer

Located on the burner funnel, the flame sensor
detects when the igniter is hot enough to light the gas burner. When the igniter is
hot enough, the flame sensor shuts off current to the igniter and that current then flows
through the gas valve coils, which open the gas valves to light the burner. If your flame
sensor isn’t working, replace it using the steps in this video. Wear work gloves to protect
your hands. Now, let’s get started. Unplug the dryer. Shut off the gas. Pull the lint
screen out of the housing in the top panel of the dryer. Use a Phillips screwdriver to
remove the 2 screws that secure the lint screen housing to the top panel. Push a putty knife
under the lid near the left and right edges of the front of the dryer. Lift the top and
prop it securely against the wall behind the dryer. Use a slot screwdriver to release the
locking tab on the wire harness plug for the door switch. Use a nut driver to remove the
front panel mounting screws from the inside of the cabinet. Pull the front panel forward
slightly, and then lift and unhook it from the two bottom hangers. Pull the front panel
off of the dryer and set it aside. Note the configuration of the belt on the idler pulley
and the motor pulley before removing it—you might find it helpful to take a digital picture
so that you remember how to reinstall it. Push the idler pulley to the right to release
tension on the drive belt. Pull the drive belt off of the idler pulley and the motor
pulley. Use the drive belt that you just released from the pulleys to lift the drum up and out
of the dryer cabinet. Disconnect the wires from the flame sensor. Remove the mounting
screw and pull the old flame sensor out of the dryer. Position the new flame sensor on
the burner funnel and reinstall the mounting screw. Connect the wires to the new flame
sensor. Place the rear of the drum on top of the support roller that’s on the rear panel
inside the dryer cabinet. Lift the front of the drum to access the drive motor and idler
pulley. Thread the drive belt through the idler pulley. Push the idler pulley to the
right and loop the drive belt over the motor pulley. Position the front panel on the hangers
at the bottom of the cabinet. Line up the mounting screw holes and reinstall the screws
in the top of the front panel to secure it to the dryer cabinet. Plug the wire harness
back into the plug on the door switch. Lower the top panel and snap it into place. Reinstall
the screws in the lint duct housing and reinstall the lint screen. Plug the dryer into the wall
outlet. Turn on the gas supply to the dryer.

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