Troubleshooting your Sears Canada dryer when it won't start
You push the start button-and nothing happens. First, make sure the door is shut tight. If the dryer still doesn't start, there are several possible reasons, from a door switch that's not recognizing that the door is closed to a failure in the main electronic control board. A broken power cord, failed push-to-start switch or a bad timer can also prevent the dryer from starting. Some dryers use a motor relay to control the drive motor so a broken motor relay can prevent the dryer from starting.
If you hear the motor running but the drum doesn't turn, you likely need to replace the drive belt. Some dryers use a belt switch to keep the drive motor from running so you might not hear the motor run when the drive belt breaks. A failed drive motor will also prevent the dryer from starting.
How to fix your Sears Canada dryer when it won't turn off
The load is dry, yet the dryer keeps running and running. Before that unnecessary heat damages your clothing and drives up your utility bill, you may need to replace the timer or the electronic control board that isn't ending the cycle. If your dryer uses a mechanical timer and doesn't stop when the dial reaches the off position, then a failed contact in the timer is likely causing the dryer to continue running and you'll need to replace the timer. If your dryer uses an electronic control, a stuck motor relay on the electronic control board can cause the dryer to run constantly with the dryer door closed. If the dryer stops only when you open the door, you'll likely need to replace the electronic control board.
If the dryer won't turn off when you open the dryer door, the dryer door switch likely failed. Replace the door switch if it doesn't accurately detect the door being open or closed.