American Dryer Corp. MD-170 - Manual (Page 62)

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10. Failed microprocessor controller (computer controlled models Only)...temperature calibration is
inaccurate.
11. Failed microprocessor temperature sensor (computer controlled models Only)...calibration is inaccurate.
12. Exceptionally cold/humid or low barometric pressure atmosphere.
13. Microprocessor temperature sensor (computer controlled models Only) is covered with lint.
NOTE: Lint accumulation on the sensor bracket can act as an insulator which will affect the accuracy of
the Automatic Drying Cycle.
K. Main burners are burning with a yellow flame (for Gas Models ONLY)...
1. Poor air/gas mixture (too much gas or not enough air) at burner...
a. Not enough make-up air.
b. Restriction in exhaust.
c. Gas pressure too high.
d. Impellor (blower/fan) "squirrel cage" rotating in the wrong direction.
e. Burner orifice size (D.M.S.) too large for application (i.e., high elevation).
L. Condensation on main door glass...
1. Too long, undersized, or improperly installed duct work.
2. Dryer connected to common exhaust duct with another dryer, and no back draft damper was installed in
customer-furnished duct work.
3. Customer-furnished back draft damper in duct work is sticking in partially closed position.
M. Dryer or scraping noise at tumbler (basket) area...
1. Check for object caught in tumbler (basket)/wrapper area.
2. Tumbler (basket) is out of proper alignment ...
a. Check both vertical alignment and lateral alignment.
b. Check gap between front panel and tumbler (basket) set screws may have come loose, and tumbler
(basket) walked forward or back.
3. Loose tumbler (basket) tie rod.
4. Failed tumbler (basket) support.