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Speed Queen Commercial Dryer won't stop

If your Speed Queen commercial dryer won't stop or keeps running after the cycle ends, the most likely cause is restricted airflow from a clogged vent or lint buildup, which makes the dryer run longer, raise cabinet temperature, and sometimes cause a burning smell — clean the venting and lint path first. Next, check the control settings: anti-wrinkle or similar options tumble the drum intermittently after a cycle, so make sure that feature is off. If the problem continues, inspect the blower wheel for lint clogs or a worn sleeve that lets it wobble and lose airflow; remove the vent and test airflow and spin the wheel by hand. Also confirm incoming power is steady: a loose plug or tripped breaker can cause erratic operation. If venting, blower and power look fine and the dryer is heating normally, a faulty control board or main control board may be keeping the machine running too long; look for burned components or test voltage to the drive motor with a multimeter. Enter your model number at RepairClinic.com to find the exact replacement part for your dryer.

01 - Air Flow Problem

If the vent line is clogged or partially clogged, it will restrict the airflow through the dryer, substantially increasing the drying time and cabinet temperature and potentially causing a burning smell. To ensure proper dryer performance, you should clean your dryer's venting system at least once per year.
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02 - Anti-wrinkle cycle option selected

Most dryer models have an anti-wrinkle cycle option that can be selected to reduce wrinkles. When selected the dryer drum will tumble the clothes every few minutes after the cycle is completed to help keep wrinkles from occurring. If this option was inadvertently selected the dryer will intermittently run until the clothes are removed.
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03 - Speed Queen Commercial Dryer Blower Wheel

The blower wheel draws air through the dryer and pushes the air out the vent. Clumps of lint, socks, and small articles of clothing can escape the lint filter and get caught in the blower wheel. In addition, the blower wheel sleeve can wear out, allowing the blower wheel to wobble on the motor shaft. If the blower wheel is obstructed or defective, it may take too long to dry clothes. To determine if the blower wheel is working properly, remove the dryer vent and assess the strength of the air flow. If the air flow is weak, check the blower wheel for obstructions. If no obstructions are present, try rotating the blower whee...l by hand. If the blower wheel wobbles as it turns, replace it.
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04 - Incoming Power Problem

Confirm a circuit breaker has not tripped and the power cord is plugged tightly into the wall receptacle. A loose plug can provide intermittent power to the dryer and cause it to spinning stop during the cycle.
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05 - Speed Queen Commercial Dryer Control Board

A dryer's control board controls the voltage being sent to all of the appliance's electrical components. If there's no obstruction in the dryer's venting and the dryer is heating to the proper temperature, it's possible the control board is defective and allowing the appliance to run longer than it should. You can inspect the board for signs of damage or a shorted component. You can also use a multimeter to test for voltage reaching the drive motor after reviewing the dryer's wiring diagram.
Common

06 - Speed Queen Commercial Dryer Main Control Board

A dryer's main control board controls the voltage being sent to all of the appliance's electrical components. If there's no obstruction in the dryer's venting and the dryer is heating to the proper temperature, it's possible the control board is defective and allowing the appliance to run longer than it should. You can inspect the board for signs of damage or a shorted component.
Common

Frequently Asked Questions

Why does my dryer keep running after the cycle ends (dryer won't stop)?
My dryer keeps running and takes too long to dry — could a clogged vent be the cause?
My dryer starts then stops during a cycle — is this an electrical issue (dryer starts then stops)?
Can a bad control board cause my dryer controls not to work or make the dryer run continuously?
How do I enter my model number or part number on RepairClinic.com to get the correct replacement part?