The Most Common Reasons Electric Dryers Stop Heating
If your electric dryer suddenly stops heating, it can disrupt your household routine and leave you frustrated. Thankfully, most heating issues are caused by common problems that are relatively easy to identify and fix. Here are the most frequent culprits behind a non-heating dryer and tips for addressing them:
1. Faulty Heating Element
The heating element is the core component responsible for generating heat in an electric dryer. Over time, it can wear out or break, causing the dryer to stop heating. A multimeter can be used to test the heating element for continuity. If it's defective, replacing it is often straightforward.2. Blown Thermal Fuse
The thermal fuse is a safety feature that cuts power to the heating element if the dryer overheats. A blown thermal fuse is a common issue and typically indicates a clogged vent or restricted airflow. To resolve this, replace the fuse and ensure your vent system is free from lint and obstructions.3. Clogged Ventilation System
Restricted airflow due to lint buildup in the vent or exhaust system can cause the dryer to overheat and shut down the heating element. Regularly cleaning the vent system not only restores proper heating but also improves efficiency and reduces fire risk.4. Defective Thermostat or Thermistor
Many dryers use thermostats to regulate temperature. A faulty high-limit thermostat or cycling thermostat can prevent the dryer from reaching the desired heat level. Testing the thermostat with a multimeter and replacing it if necessary can resolve the issue. Other dryers use thermistors, which change in resistance with temperature. Such dryers will have control boards that monitor the thermistor's resistance. They often go change in value and give the control board the wrong information. Here is a link to the Thermistor Cheat Sheet5. Broken Thermal Cut-Off Switch
The thermal cut-off switch is another safety mechanism that shuts off the heating element in cases of extreme overheating. Like the thermal fuse, it can be tested for continuity and replaced if defective. Addressing the root cause of overheating is also crucial.6. Power Supply Issues
Electric dryers require 240 volts of power to operate the heating element, provided via two 120-volt circuits. If one circuit breaker trips or a power cord connection is loose, the dryer may run but won’t heat. This specifically refers to the voltage line known as "L2". Ensure the circuit breakers are fully reset and the power cord is securely connected. Experienced Technicians can use a multimeter (Preferrably a LoZ Meter), to test the voltages at the outlet to ensure they are not compromised.7. Control Board or Timer Malfunction
Modern dryers often have control boards or timers that manage various functions, including heating. If these components fail, they can disrupt the heating cycle. Inspect the control board or timer for visible damage or test it for faults. Replacement may be necessary if defective.Prevention Tips
- Regular Maintenance: Clean the lint trap after each use and inspect the vent system periodically.- Professional Inspections: Schedule a professional dryer inspection annually to catch issues early.
- Avoid Overloading: Overloading the dryer can strain components, leading to failures over time.
By identifying and addressing these common problems, you can restore your electric dryer’s heating functionality and avoid costly replacements. If troubleshooting doesn’t resolve the issue, contacting a professional technician is your best bet.