Symptoms
- Motor housing feels very hot to the touch
- Burning smell during or after use
- Motor slows down or trips a thermal overload after extended use
- Performance drops noticeably when hot
Likely causes
- CommonDull blade forcing the motor to work harderA dull blade increases resistance and heat generation significantly.
- CommonSawdust-clogged motor vents blocking airflowTrapped dust prevents the motor from cooling as designed.
- CommonExtended heavy-duty ripping without rest breaksContinuous demanding cuts don't give the motor time to cool.
- PossibleWorn bearings adding frictionFailing bearings make the motor work harder and run hotter.
- PossibleUndersized extension cord causing voltage dropLow voltage makes the motor draw more current and heat up.
What to do
- Turn off the saw and let it cool fully before inspecting anything.
- Check the blade for dullness and replace or sharpen it if needed.
- Clean sawdust from the motor housing vents with compressed air.
- Take breaks between long or demanding rip cuts to let the motor cool.
- Use a properly rated, short, thick-gauge extension cord if one is in use.
- If overheating continues with a sharp blade and clean vents, have the motor and bearings inspected.
Tools and parts
- Compressed air
- Replacement blade if needed
- Properly rated extension cord
When to call a pro
If the motor keeps overheating after a sharp blade and clean vents, a repair shop should check the bearings and windings.
Safety
Use caution
Let a hot motor cool before touching it, and unplug the saw before cleaning near the motor housing.