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2. Failed electric heating element(s).
STEAM MODELS...
1. Air-operated system...
a. No (external) compressed air (80 PSI [5.51 bar] is required) to steam damper solenoid.
b. Failed steam damper pneumatic solenoid.
c. Steam damper stuck in closed position, check for obstruction.
d. Leak in pneumatic system.
e. Failed steam damper air piston.
f. Flow control valve misadjusted.
2. Electrical mechanical system...
a. Failed electrical mechanical motor.
b. Steam damper stuck in closed position, check for obstruction.
J. Dryer operates but is taking too long to dry...
1. Exhaust ductwork run is too long or is undersized, back pressure must be no less than 0 and cannot exceed
0.3 inches (0.74 mb) of water column (W.C.).
2. Restriction in exhaust ductwork...
a. Dryer back draft damper is sticking partially closed.
b. Restriction/obstruction in ductwork...
1) Check ductwork from the dryer ALL the way to the outdoors.
3. Insufficient make-up air.
4. Blower (impellor/fan) is rotating in the wrong direction (for 3-phase [3ø] models only).
5. Lint screen is dirty or is not being cleaned often enough.
6. Inadequate airflow...
a. Blower (impellor/fan) failure.