A leaf blower may not reach full speed due to several factors, including a clogged air filter or exhaust, which restricts airflow and engine performance. Additionally, issues with the fuel mixture, such as using the wrong gas-to-oil ratio, can affect engine efficiency. Mechanical problems, like a malfunctioning spark plug or carburetor, may also prevent the blower from operating at its optimal speed. Regular maintenance can help address these issues and ensure the blower functions properly.
If it's a fan speed issue check the blower motor resistor & the blower motor. Check the plugs at the resistor and blower motor for burn marks also.
Could be,Blown fuse,Bad blower motor,Bad blower motor switch,Bad blower motor speed resistor,
Common causes, blower motor resistor, blower motor, wiring or controls
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Sounds like the wire that goes to the blower that is behind the glove box which you would have to remove then pull the wire off and push back on, that's usually the problem.
2001 buick lesabr // when recirculate speed doesnt change only make humming sound rest of heater works fine
Some jet skis have a learning mode which wont allow you to go full speed and full rpm's, use that.
Blower motor bad. Blower resistor bad. Switch bad. Fuse blown.
It may be the resistor pack along the firewall under the fuse cover somewhere. This controls the speed of the fan.
Same problem on mine...I had the blower motor module replaced and it works great.
Should under dash on firwall near blower motor.
Classic symptoms of a burned out blower motor speed resistor. Examine the wire harness and all connections for damage. The year, make and model info would help for more detailed info.