Dryer Overheat Switch Troubleshooting

On this page

Quick answer
Confirm the symptom
Tools and prep
Step-by-step troubleshooting
Common causes table
Parts matching
When to call a pro
FAQ
Related guides

Quick answer

If your dryer stops mid-cycle and won't restart, the overheat switch might be tripped. First, ensure the dryer is unplugged. Then, check for proper ventilation and clean the lint filter. If the problem persists, you may need to replace the overheat switch.

Confirm the symptom

Dryer stops mid-cycle.
Dryer won't start after stopping.
No error codes displayed.
Dryer is hot to touch.
Dryer has poor or no airflow.
Burning smell when dryer is running.

Tools and prep

Screwdriver (Phillips or flathead, depending on your model).
Multimeter (to test electrical continuity).
Work gloves for safety.
Ensure the dryer is unplugged from the power source.
Clear the area around the dryer for easy access.

Step-by-step troubleshooting

Access the Overheat Switch
Do: Locate the overheat switch, usually found on the blower housing or near the heating element.
Observe: Check for any visible damage or burnt marks.
Means: Inspect the switch for any signs of wear or damage.
Next: Test the switch with a multimeter.
Test the Overheat Switch
Do: Set your multimeter to the ohms setting.
Observe: Touch the multimeter probes to the switch terminals.
Means: A functional switch should show continuity (a reading close to zero).
Next: If no continuity, replace the switch.
Check for Blockages
Do: Inspect the dryer vent and exhaust duct for blockages.
Observe: Look for lint buildup or obstructions.
Means: Clear any blockages to ensure proper airflow.
Next: Reassemble the dryer and test it.
Clean the Lint Filter
Do: Remove the lint filter and clean it thoroughly.
Observe: Ensure the filter is free of lint and debris.
Means: A clean filter allows for better airflow and prevents overheating.
Next: Reinsert the filter and test the dryer.
Inspect the Ventilation
Do: Ensure the dryer vent is properly connected and not kinked.
Observe: Check for any restrictions in the venting system.
Means: Proper ventilation prevents overheating.
Next: If the problem persists, consider replacing the overheat switch.
Replace the Overheat Switch
Do: Purchase a new overheat switch compatible with your dryer model.
Observe: Follow the manufacturer's instructions for replacement.
Means: A new switch should restore proper functioning.
Next: Test the dryer to ensure the issue is resolved.

Common causes

Cause	Likelihood	Difficulty	Part often needed
Blocked Vent Restricts airflow, causing the dryer to overheat.	Common	Easy	None
Dirty Lint Filter Reduces airflow, leading to overheating.	Common	Easy	None
Faulty Overheat Switch Switch trips due to overheating, stopping the dryer.	Sometimes	Easy-Medium	Overheat Switch
Poor Ventilation Inadequate airflow causes the dryer to overheat.	Sometimes	Easy	None
Malfunctioning Heating Element Can cause the dryer to overheat and trip the switch.	Rare	Medium	Heating Element
Wiring Issues Faulty wiring can cause the switch to malfunction.	Rare	Hard	Wiring Components

Parts matching

Ensure you have the correct parts for your dryer model. Check the manufacturer's website or consult the user manual for specific part numbers.

Overheat Switch: Replaces the faulty switch that trips due to overheating.
Lint Filter: Keeps the dryer clean and ensures proper airflow.
Vent Kit: Improves ventilation and prevents overheating.
Heating Element: Replaces a malfunctioning element that causes overheating.
Wiring Components: Fixes any electrical issues that may affect the overheat switch.

Always double-check the part numbers to ensure compatibility with your dryer model.

When to call a professional

If the dryer continues to overheat after replacing the switch.
If you're not comfortable working with electrical components.
If there are signs of significant damage to the dryer.
If the dryer is under warranty, contact the manufacturer.
If you suspect gas leaks or other safety hazards.
If the dryer is making unusual noises or smells.

FAQ

How often should I clean my dryer vent?

It's recommended to clean your dryer vent at least once a year to prevent blockages and ensure proper airflow.

Can I replace the overheat switch myself?

Yes, if you're comfortable with basic electrical work. Always ensure the dryer is unplugged before starting any repairs.

What if my dryer still overheats after replacing the switch?

Check for other potential issues like a blocked vent, dirty lint filter, or malfunctioning heating element.

How do I know if my overheat switch is faulty?

Use a multimeter to test for continuity. If there's no continuity, the switch is likely faulty and needs replacement.