Repairs In-House
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Pellet Stove Making Noise
Written by Dries Nijs4 min read
Pellet Stove Noise: Where Does It Come From?
Pellet stove noise usually originates from the fans, the auger motor, vibrating panels, or dirt. A soft and constant sound is normal, while a squeaking or grinding noise indicates wear. Clean first, and have a bearing or fan repaired if the noise persists.
A new, sharp, or increasingly loud noise always warrants investigation.
If your pellet stove is noisy, it usually comes from one of the fans (the exhaust fan or the convection fan), the auger motor, vibrating panels, or dirt. A slight hum and a soft whirring are part of normal operation. A squeaking, grinding, or loud knocking sound often indicates wear or a defect.
This guide helps you distinguish between normal operating sounds and signals that require repair. You'll learn where to look for the source, what steps you can take yourself, and when to call a technician. This way, you avoid replacing a part that isn't causing the noise.
Normal Noise vs. Alarming Noise
A constant and soft noise is normal, a new, sharp, or increasingly loud noise requires investigation.
Diagnosis First, Then Advice
We first identify the true source of the noise. This way, you don't pay for a part that doesn't solve the problem.
Experience with All Brands
We know the typical sounds of each brand and model. This allows us to quickly identify a worn bearing or a loose fan blade.
Steps to Identify the Source of the Noise
Listen carefully to where the noise is coming from: the back, bottom, or side of the stove.
Turn off the stove and let it cool, then check if all panels and doors are securely fastened.
Clean the burn pot, ash pan, and heat exchanger, as dirt disrupts airflow and causes extra noise.
Restart the stove and note when the noise occurs: during startup, dosing, or at full load.
Compare the pattern: noise during dosing points to the auger, noise that varies with the draft points to the exhaust fan.
If grinding or squeaking persists after cleaning, note when it occurs and call a technician.
Checklist: What Each Noise Means
Soft whirring that builds up and down, convection fan, normal
Humming that gradually gets louder, exhaust fan dirty or bearing worn
Rhythmic ticking during refilling, auger dosing pellets, usually normal
Grinding or creaking noise, worn bearing, needs checking
Rattling or knocking, loose fan blade or imbalance, needs checking
Whistling or squeaking, air leak or bearing issue, needs investigation
Use this checklist to organize your observations before replacing anything. Pay special attention to whether the noise is new and if it correlates with a specific phase of operation. These two pieces of information will quickly lead you to the right cause and help a technician search more effectively.
Cleaning and the Auger as First Steps
Always start with a thorough cleaning, as most noise complaints disappear after removing ash and dust. Clean the burn pot, ash compartment, and convection fan blades, and dust the heat exchanger. A caked fan becomes unbalanced and starts to hum or vibrate.
The exhaust fan is located on the exhaust side and collects soot and fine ash. Even a thin layer of residue on the blades disrupts balance and causes a heavier hum. During annual maintenance, this fan is cleaned, preventing many noise complaints in advance.
Vibrating panels and loose screws are another common source. Metal expands when heated, causing a panel to rattle against the frame. Carefully tighten visible screws and check if the stove is stable and level. A stove on an uneven floor transmits vibrations more easily.
If you prefer to check the stove step by step, follow our guide on pellet stove cleaning step by step. If you mainly hear noise during dosing, the cause lies with the auger motor. This same motor also plays a role when the pellet stove stops feeding pellets.
When to Call a Technician
Call a technician if the noise persists after cleaning, or if you hear a grinding, scraping, or squeaking bearing. Such noises indicate wear that won't disappear on its own. Continuing to use the stove puts extra strain on the motor and can increase damage.
A squeaking or grinding bearing is best handled by a professional. Replacing a bearing or an entire fan requires the right part and proper alignment. If not done carefully, the noise will return quickly, or the new motor will also become unbalanced. A technician will also test the draft and combustion after the repair.
Also, watch for odors or overheating that occur along with the noise. A fan that runs heavily becomes warmer than usual and can cause the stove to malfunction. If you also receive an error code along with the noise, note it, as the message often points directly to the part that needs attention.
For a targeted diagnosis of the noise, our overview pellet stove making a lot of noise can help you further. If you suspect the exhaust fan, check the symptoms of a defective exhaust fan. If you want a broader approach, our guide on pellet stove problems and repairs covers the most common defects.
If you're unsure about the cause of the noise or hear a bearing grinding, don't wait too long. Request a free quote or advice and we will check your pellet stove.
Need Your Pellet Stove Checked or Repaired?
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Frequently asked questions
Increased noise usually results from dirt or wear. Dust and ash in the fans and a worn bearing gradually increase the noise. Clean thoroughly first, and have it checked if the noise persists.
A soft and constant hum is part of the exhaust fan's operation and is normal. If the hum gets louder or uneven, it often indicates dirt or a bearing starting to wear. Have it checked.
Often yes, if the cause is dirt or a loose panel. Clean the burn pot, ash pan, and fans, and secure loose panels. A squeaking or grinding bearing, however, requires a technician with the right parts.
A persistent grinding, scraping, or loud knocking noise is a warning. It indicates a worn bearing, a loose fan blade, or imbalance in a fan. Stop using the stove and have the cause checked first.
