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6. "No Heat" drive and blower motors run, display reads normal (Steam Models).
A. Check for voltage across terminal block nos 3 and 7.
If no voltage is present, problem is bad wire(s) or termination(s) between terminal block 3 to MP
harness connector pin 4.
B. If voltage is present, check for voltage across terminal block nos. 4 and 7.
If no voltage is present, problem is bad wire(s) or termination(s) from terminal block 3 to tumbler
hi-limit switch and back to terminal block 4, or faulty tumbler hi-limit switch.
C. If voltage is present across terminal block nos 4 and 7, check for voltage across the Pneumatic Steam
Damper Solenoid (red & green wires).
If no voltage is present, problem is bad wire(s) or termination(s) between terminal block nos. 4 and
7 and the Damper Solenoid.
If voltage is present, problem is faulty Damper Solenoid.
7. "Door" condition
NOTE: Make sure main door and lint drawer are closed. Also, if checking either switch, the
plunger must be depressed.
Check LED input light "door" on component side of the computer. If light is on, replace computer.
A. Check voltage (24 VAC) across terminal block nos. 5 and 7.
If voltage is present, problem is bad wire(s) or termination(s) between terminal block 5 and computer
15 pin connector 2, or faulty computer.
If no voltage is present, check for voltage across the 15 pin modular connector nos. 1 and 2 against
ground.
If voltage is evident at both points, problem is bad wire(s) or termination(s) between terminal block
5 and pin 2 of the 15 pin modular connector or pin 1 of that same connector to the in-line connector
on the output of the 24 volt XFMR located in the computer box area.