Understanding Sail Switch Functionality and Open Faults in Dryers | ADC Dryer Safety Features

K. Main Door Switch

The main door switch is located in the main door hinge block. When the main door opens, the switch will also open, preventing the dryer from operating. The main door switch is a safety device and should never be disabled.

L. Sail Switch (Gas Models ONLY)

The sail switch is located on the front of the burner box. A sail switch consists of a round damper plate on a lever arm which is in contact with an electric switch. When the air blower comes on, it draws air through the gas burner. This creates a negative pressure inside the burner box, and this negative pressure pulls in the round damper and activates the sail switch. If there is improper airflow, the damper will not pull in, preventing the burner from starting.

Improper airflow can be caused by improperly designed exhaust ducting where the duct run is too long or has too many sharp bends in it. It can also be caused by a lack of make-up air.

M. Hi-Limit (Gas Models Only)

A hi-limit thermostat is located at the burner. This is an automatic reset disc-type thermostat set at 330º F for gas dryers. If the flame in the burner should get too hot, this thermostat will shut off the burner. This is generally caused by low airflow in the dryer.

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American Dryer Corp AD-170 service manual Main Door Switch, Sail Switch Gas Models only, Hi-Limit Gas Models Only

Contents

AD-170 AD-170 Retain This Manual In a Safe Place For Future ReferencePage For Your Safety Table of Contents Sail Switch Assembly Important Information Safety Precautions Cleaning Routine Maintenance Lubrication Adjustments Enclosure, Air Supply, and Exhaust Requirements Installation Requirements Electrical and Gas Requirements Operational Service Check Procedure DSI Module Gas Models Only Computer Panel AssemblyDescription of Parts Control Box Blower Motor and Impellor 50Hz, 60Hz Steam & 50Hz Gas Gas Burner AssemblyDrive Motor Blower Motor and Impellor Hz Gas Models Only Idler Assembly Tumbler Bearing and Pulley ArrangementBasket Tumbler Main Door Switch Sail Switch Gas Models onlyHi-Limit Gas Models Only Steam Damper System Automatic Reset ThermostatLint Drawer Switch Lint Drawer Introduction Servicing Computer Controls To Replace Computer To Replace Keyboard Label Assembly To Replace Microprocessor Temperature Sensor Probe Page To Replace Main Burner Orifices To Replace Gas Valve see burner illustration on To Test and Adjust Gas Water Column Pressure To Convert from Natural Gas to L.P. Gas To Replace Burner Tubes To Replace DSI Module Sail Switch Assembly Gas Models Only To Adjust Sail Switch To Replace Sail Switch To Install New Main Door Glass To Replace Main Door Assembly To Replace Main Door Hinge Pad To Replace Front Panel To Replace Small Idler Pulley Pulleys To Replace Tumbler Pulley To Replace Motor Pulley To Replace Large Idler PulleyPage To Replace Tumbler Basket or Tumbler Basket Support Basket Alignment Lateral Side to Side Adjustment Important Never strike the shaft directly with a hammer To Replace Front Idler Shaft Pillow Block Bearing To Replace Front Basket Support Pillow Block Bearing Belt Tension Adjustment Basket to Idler To Replace Rear Idler Shaft Pillow Block BearingBelts See illustrations in section F Pulleys Belt Tension Adjustment Motor to Idler To Replace V-BeltsMotors To Replace Drive Motor Page Lint Drawer Assembly To Replace Lint Screen To Replace Lint Drawer SwitchImpellor Troubleshooting No display on computerComputer will not accept key pad entries Drive motor runs, burner is on, but basket will not turn Dryer will not start, but computer display indicators are on Dryer operates but is taking too long to dry Dryer operates, probe sparks, but gas does not flow Dryer is cycling on burner hi-limit safety thermostat Thermal overload for drive motor is trippingOverload for impellor fan motor is tripping Display reads dSFL. Dryer Sensor Circuit Failure Dryer does not start. Display reads doorThere is excessive vibration coming from the basket Electrical Trouble Shooting Diagnostic LED Display Failure Codes Phase 5 OPL System Diagnostics LED Display Indicators Page Page Cycle Status LED Display/Codes CY F LED Display Codes Fill Computer Logic and Wiring Diagram Fault CodesPage No Display Condition Page Blower motor does not operate, drive motor runs Door condition Microprocessor reads Dsfl Motor Plate High and Low Voltage Technical Information Information on the Data Label Data Label Contacting American Dryer Corporation ADC HOW to USE a Manometer Using a Manometer AD-170SE Tool List ADC450400 1- 02/27/98-50