1. Check the heater: the dryer can not be heated, first check whether the heater is normal. You can use a multimeter to check whether the resistance value of the heater is within the normal range. If it is not within the normal range, the heater needs to be replaced.

2. Check the thermal protector: If the heater is normal, check whether the thermal protector is burned out. If the thermal protector burns out, a new thermal protector needs to be replaced.

3. Check the temperature controller: If the above two items are not faulty, you need to check whether the temperature controller is normal. Temperature controller damage also need to contact a professional for repair.

1. Check the drum support: When the dryer makes noise, first check whether the drum support is normal. Whether the drum support is deformed or loose may cause noise.

2. Check the drum belt: If the drum support is normal, you can check whether the drum belt is loose or worn. If the belt is loose or worn, it needs to be replaced with a new belt.