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(1) Fault in ignitor wiring...break or loose connection.
(2) Failed ignitor assembly.
(3) Failed HSI module.
V. Dryer operates but is taking too long to dry...
1. Exhaust duct work run too long or is undersized...back pressure cannot exceed 0.3 inches water column
(W.C.) - .74 millibars.
2. Restriction in duct work ...
a. Dryer back draft damper is sticking partially closed.
b. Restriction/obstruction in duct work ...
1) Check duct work from dryer all the way to the outdoors.
3. Insufficient make-up air.
4. Impellor (fan/blower) 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 air flow ...
a. Impellor (fan/blower) failure.
7. Low or inconsistent gas pressure
Natural Gas pressure - must be 3.5 inches of water column (W.C.) - 8.7 millibars.
L.P. (liquid propane) Gas pressure - must be 10.5 inches of water column (W.C.) - 26.1 millibars.
8. Poor air/gas mixture at burner (too much or not enough air) at the burner...yellow or poor flame pattern...
a. Not enough make-up air.
b. Restriction in the exhaust.
9. Poor air/gas mixture at burner (too much gas or not enough air) at the burner...yellow or poor flame
pattern ...
a. Gas pressure too high.
b. Impellor (fan/blower) is rotating in the wrong direction (for 3-Phase [3ø] Models ONLY).
c. Burner orifice size (D.M.S. [drill material size]) too large for application (i.e., high elevation).
10. Sail switch is fluttering ...
a. Restriction in the exhaust ...