If you are searching the answer why your Kenmore dryer refuses to heat up the air, this piece of information may help you. Even if the program starts, but the dryer does not heat, an error is displayed or the machine turns the drum for a very long time and the air does not heat up, your appliance requires a check. When drying blows with cold air, does not dry the laundry, you have water in the drum, it works for a long time, then there can be many issues, here are the most common of them:
1. Heating elements burned out.
2. The temperature sensor is out of order or the wires on the board or on the temperature sensor are oxidized.
3. Thermal fuse or thermal relay tripped or failed to recover.
4. The brushes on the tank have worn off.
The first thing you need to check is whether the ignition system is working. You can do this by removing the small panel located at the bottom left corner on the front of your machine. If the ignition glows when you turn on the dryer, that means that the ignition and everything leading to it are working. Take note of what happened when you tested the ignition since this will guide you later on. You can fix it all yourself, but you will need to carefully disassemble and get to the heating elements.