How to troubleshoot snow blower auger issues
Steven E / Tuesday March 18, 2025
Having trouble with your snow blower’s auger? It’s a real pain, especially when the snow’s coming down hard. Whether the auger’s not spinning, making odd sounds, or just isn’t tossing snow like it should, figuring out the problem and fixing it is key to keeping your snow blower humming. In this guide, we’ll check out common auger issues, what might be causing them, and walk you through how to sort them out step by step.
This info might not match your exact snow blower model. We do our best to give helpful DIY repair advice, but different models can have unique troubleshooting steps, error codes, or parts. For the best guidance, it’s a good idea to check your manufacturer’s manual or give us a shout if you’ve got questions.
How the auger works
The auger is the heart of your snow blower’s snow-clearing operation. It’s responsible for scooping up snow and directing it into the chute for discharge. Knowing how it works can help you troubleshoot issues.
- Single-stage snow blowers: In these models, the auger does all the work, scooping and throwing the snow in one motion. The auger blades are in direct contact with the ground.
- Two-stage snow blowers: These have a separate impeller that works with the auger. The auger scoops the snow, and the impeller throws it out through the chute.
- Three-stage snow blowers: These add an accelerator to the system. The auger scoops snow, the accelerator speeds up snow movement, and the impeller propels it out.
Key components of the auger system
- Auger blades: Spiral-shaped blades that scoop and move snow.
- Shear pins: Safety pins that connect the auger to the drive shaft and protect the motor if the auger encounters a hard object.
- Auger shaft: The central rod that connects the auger to the gearbox and ensures smooth rotation.
- Gearbox: Transfers power from the engine to the auger, enabling it to rotate and clear snow.
Read more: Snow blower won’t shift: A troubleshooting guide
1. Drive belt issues
The drive belt transfers power to the auger. If it’s worn, stretched, or broken, the auger won’t turn.
How to fix it:
- Turn off the snow blower: Disconnect the spark plug and let the engine cool.
- Access the belt: Remove the cover near the engine to expose the belt.
- Inspect and replace: Check the belt for wear or damage. If needed, slide it off the pulleys and install a new one.
- Reassemble and test: Reattach the cover, reconnect the spark plug, and test the auger.
Tip: Check the belt regularly to catch wear early and avoid downtime.
2. Broken or missing shear pins
Shear pins are designed to break if the auger hits something hard, like a rock or ice chunk, to protect the motor and gearbox. If they’re broken or missing, the auger won’t turn.
How to fix it:
- Turn off the snow blower: Disconnect the spark plug for safety.
- Inspect the auger: Look along the auger shaft for missing or broken shear pins.
- Replace the pins: Remove any broken pin pieces using pliers. Insert a new shear pin through the aligned holes in the auger shaft and secure it with the provided fastener.
- Test the auger: Reconnect the spark plug and start the snow blower to ensure the auger rotates smoothly.
Tip: Keep spare shear pins handy to avoid delays during heavy snowfalls.
3. Clogged auger housing
Packed snow, ice, or debris can block the auger, preventing it from turning properly.
How to fix it:
- Turn off the snow blower: Disconnect the spark plug to ensure the machine is off.
- Inspect the auger housing: Look for compacted snow, ice, or debris that could be obstructing the auger.
- Clear the clog: Use a clearing tool or a sturdy stick to remove the blockage. Never use your hands.
- Check for remaining debris: Inspect the chute and auger area to ensure everything is clear.
- Test the auger: Reconnect the spark plug, start the snow blower, and confirm that the auger rotates freely.
Tip: Clear heavy or wet snow in smaller passes to avoid clogs.
4. Damaged or misaligned auger blades
Cracks, bends, or excessive wear on the auger blades can reduce performance or prevent the auger from turning.
How to fix it:
- Turn off the snow blower: Disconnect the spark plug and allow the machine to cool.
- Inspect the blades: Look for visible cracks, bends, or worn edges on the auger blades. Check if the blades are properly aligned along the auger shaft.
- Repair or replace: For minor bends, carefully straighten the blades using a wrench or pliers. If the damage is significant, remove the damaged blade and replace it with a new one, ensuring it is securely attached.
- Test the auger: Reconnect the spark plug, start the snow blower, and check if the blades rotate smoothly and evenly.
Read more: How to replace a snow blower auger belt
5. Gearbox or shaft problems
The gearbox transfers power from the drive belt to the auger. Worn gears, leaks, or lack of lubrication can prevent the auger from turning properly.
How to fix it:
- Turn off the snow blower: Disconnect the spark plug and ensure the engine is cool.
- Inspect the gearbox: Look for visible damage or signs of leaking oil. Check the shaft and surrounding components for rust or wear.
- Check lubrication: Open the gearbox and verify there’s enough grease or oil. Add lubricant if needed.
- Replace damaged parts: If gears are worn or stripped, remove and replace them with compatible parts for your snow blower model. Reassemble the gearbox, ensuring everything is aligned correctly.
- Test the auger: Reconnect the spark plug, start the snow blower, and confirm the auger operates smoothly.
Read more: Snowblower chute won’t turn: A troubleshooting guide
Additional information
Fixing your snow blower’s auger doesn’t have to be a headache. By following these steps, you can spot and fix common problems, making sure your gear’s ready when you need it most. For quality replacement parts and more repair tips, swing by AppliancePartsPros.com. We’re here to back you up with expert advice and reliable parts.
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If you’ve got any questions or need a hand, please reach out to us. We’re always happy to help keep your appliances running smooth.
With nearly a decade of experience in providing top-notch customer service regarding appliance parts and repair, Steven enjoys sharing practical advice, troubleshooting tips, and interesting information to help readers stay informed.