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2a) Burner fan air pressure switch.
3a) Pilot gas valve.
4a) Ignition transformer.
5a) Motorized gas valves.
6a) MS4 AUX.
7a) MS8.
8a) Flame detector and burner chassis ground.
9a) Burner controller.
b) POSSIBLE SOLUTIONS;
1b) Verify that the burner controller module has power. With control voltage “ON,” verify that the burnt
fuse L.E.D. indicator of fuse #6 is not “ON.”
• If the L.E.D. is “ON” check the fuse.
• If the fuse holder L.E.D. is “OFF” verify that MCR (motor control relay) pin #43 has 110 VAC,
and that pin #1 of the burner controller is 110 VAC. The indicator light is on the left side of the
burner base is the burner controller’s power indicator.
• If burner controller module has power, go to paragraph #9b on page 69.
• If burner controller module does not have power check circuit wiring and retest.
2b) Burner Fan Air Pressure Switch
This switch must be open prior to a drying cycle, and close during a drying cycle. This feature is
required by the burner controller module. Check the function of this switch by measuring for
110 VAC from TB1-23 and TB1-9 on the main electrical panel.
Refer to dryer Main Panel Wiring Diagram.
• Press the “green” button on the front panel; control voltage “ON.”
• Measure for 110 VAC between TB1-23 and 9; it should not be present.
• If a voltage is measured check;
• Air switch adjustment.
• Switch.
• Circuitry (dryer Main Wiring Diagram and dryer Solenoid Junction Box Wiring Diagram).