The most common reasons why a Whirlpool dryer will not start are an incoming power problem, a defective door switch, a blown thermal fuse, or a defective start switch. In some cases, a broken drive belt or failed drive motor will be responsible for the issue. Follow the steps below to diagnose the problem and fix the dryer.
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The most obvious reason a dryer will not start is that it is not receiving power. While you have likely checked that the dryer is plugged in and turned on, a tripped breaker or power socket issue could be causing the problem.
Using an extension cord with your dryer could also be causing the dryer not to start, as extension cords often cannot safely transmit the electricity required to power the dryer.
For safety, dryers will not operate if the door is not closed. If the dryer will not start, there may be an issue with the door strike, latch, or the door switch. Listening for the door locking when you open and close the dryer door, and checking the door is securely closed may help diagnose the issue.
A defective door switch usually means either the contacts inside or the actuator arm have broken. Typically, the door switch is mounted to the door – behind the front panel. The front door panel or front control panel needs to be removed to locate the switch.
Dryers may contain one or more thermal fuses, which are safety features to shut off the dryer if it overheats. Thermal fuses can be tested with a multimeter for continuity to determine if they have blown. Once a thermal fuse blows, it needs to be replaced.
The thermal fuse is usually located close to the blower wheel or heating element. Depending on your model, to access the fuse, either the dryer’s rear panel will need to be removed, or the dryer cabinet will need to be disassembled.
Thermal fuses are there for a reason. If a thermal fuse has blown, make sure you address the issue that caused the thermal fuse to blow.
Another reason your dryer might not be working is a defective start switch. If you activate the start switch and don’t hear anything, the start switch may be the problem (especially if the components above are not responsible). If the dryer makes a humming sound when the start switch is activated, it is more likely to be a drive belt or motor issue.
Most Whirlpool dryer models have a drive belt that helps turn the dryer drum. If the belt breaks, the motor may hum, but the drum won’t turn.
The drive belt wraps around the dryer drum. The top panel of the dryer needs to be removed to check the belt, which usually means disassembling the dryer cabinet. If the belt has broken, you will need to remove the front or rear panel to install a new belt.
Some models may also have a belt switch, which shuts off power to the dryer if the belt breaks. If the belt has not broken, the belt switch may be defective and wrongly causing the dryer not to work. Therefore, if the belt is not broken, check for a defective belt switch.
If the steps above have failed to fix the problem, the dryer motor may have failed. The motor drives the belt to turn the drum and operates the blower wheel.
Before replacing the motor, make sure the blower wheel can turn freely. If something is stopping the blower wheel from turning, the dryer won’t be able to operate.
With most models, the dryer will need to be disassembled to access the motor and blower wheel. With some models, you may be able to access the motor by removing the rear access panel.
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