Resonance

Resonance in pellet stoves generally manifests as a metallic noise, a vibration, or a buzzing sound noticeable during the operation of the appliance. This phenomenon is usually attributable to the vibration of mechanical components or the airflow within the ducts.
The goal of the technical intervention is to identify the primary source of the vibration, pinpointing the responsible component and the element that generates the resonance transmitted to the entire structure of the stove.

Detected Symptom

Perception of resonance or metallic vibration during stove operation, particularly during ignition, steady-state operation, or shutdown phases.

Checks to Perform

• Check the tightening of panels and structural screws.
• Verify the fastening of the auger, gear motor, and fans.
• Clean the smoke ducts and the brazier.
• Check the fan speeds and the noise levels of the motors.
• Conduct an operational test at different power levels to identify any variations in acoustic behavior.

Expected Outcome

Identification of the origin point of the vibration, the involved component, and the resonance mechanism that transmits the vibration to the entire machine.

Recommended Intervention

• Tightening or replacement of movable parts subject to vibration.
• Insertion of anti-vibration gaskets at critical points.
• Acoustic and mechanical insulation using specific antivibration elements.

For further checks or specialized assistance, contact the Moretti Design Technical Service at the dedicated number.