October 31, 2022 11:40 am


Do you own a pellet stove and you often wonder why does my pellet stove smoke when starting? You’re not alone. Many people experience this problem, and it can be frustrating. But don’t worry – in this blog post, we’ll discuss the reasons why your pellet stove smokes when starting and offer some tips to help you fix the problem. Read on to learn more!

What Are The Possible Causes Of Smoke When Starting A Pellet Stove?

When starting a pellet stove, it is normal to see a small amount of smoke. However, if there is a large amount of smoke, it could be caused by several things.

  • One possibility is that the pellets are wet. Wet pellets will not burn properly and can produce a lot of smoke.
  • Secondly, one of the common reasons for smoke is a leaking head gasket. This can cause coolant to enter the combustion chamber, leading to white smoke.
  • Another potential cause is a problem with the injectors or fuel system. If there is too much fuel being injected into the cylinders, it can lead to black smoke.
  • A clogged air filter can also cause black smoke as it restricts airflow to the engine.
  • Another possibility is that the combustion chamber is dirty. A dirty combustion chamber can cause the fire to smolder, which produces smoke.
  • Finally, it is also possible that the exhaust vent is blocked. A blocked exhaust vent can cause smoke to build up in the stove, resulting in a large amount of smoke when the stove is started.

What Can You Do If The Pellets Are Wet?

If the pellets in your pellet stove are wet, they will produce a lot of smoke. To avoid this, always make sure the pellets are dry before you put them on the stove. You can dry them by putting them in a sunny spot for a few hours, or by using a hair dryer on low heat. If you notice the pellets starting to produce smoke, turn off the stove immediately and let the pellets cool down. Once the pellets are cool, you can try drying them again before restarting the stove.

What If The Head Gasket Is Leaking

If you notice that your stove is emitting smoke, in most cases, this indicates that the stove’s gasket is worn out or damaged, and needs to be replaced. The gasket is a crucial component of the stove, as it helps to seal the door shut and prevent heat and smoke from escaping. Over time, the gasket can become brittle and cracked, allowing heat and smoke to escape. If you notice that your stove is leaking smoke, it is important to replace the gasket as soon as possible. Doing so will help to prevent fires and ensure that your stove operates safely and efficiently.

How To Fix The Problem With The Injectors Or Fuel System

In some cases, the cause of the smoke may be due to a problem with the injectors or fuel system. If this is the case, it’s important to have the issue addressed as soon as possible to avoid further damage.

Injectors are responsible for delivering fuel to the combustion chamber, and if they’re not working properly, it can cause excessive smoke. Additionally, if there’s a problem with the fuel system, it can also lead to an increase in smoke. Common issues that can cause problems with the fuel system include a dirty fuel filter or a clogged fuel line. If you suspect that either of these issues is causing the smoke from your stove, it’s important to have them checked out by a professional as soon as possible. By taking action quickly, you can help prevent further damage and keep your stove running smoothly.

How To Fix Clogged Air Filter

The purpose of an air filter is to remove contaminants from the air, but over time it can become clogged with dust and debris. When this happens, the air can’t circulate properly and the stove starts smoking. The best way to prevent this from happening is to regularly clean your air filter. You can do this by vacuuming it with a soft brush attachment or washing it with warm, soapy water. If your air filter is especially dirty, you may need to replace it. However, by taking some simple steps to keep your air filter clean, you can help keep your stove running smoke-free.

How To Fix Dirty Combustion Chamber

If the cause of the smoke is a dirty combustion chamber, the first step is to clean it out. This can be done with a stiff brush and some elbow grease, or you can use a commercial cleaner. Once the chamber is clean, make sure that all of the connections are tight and that there are no leaks. If everything looks good, try starting the engine again. If it still smokes, you may need to take it to a mechanic for further diagnosis.

What To Do If The Exhaust Vent Is Blocked

If you notice smoke coming from your chimney, it’s important to take action immediately. The most likely cause is a blockage in the exhaust vent. This can happen for several reasons, such as a build-up of soot or a nest of birds or other animals. Whatever the cause, it’s important to clear the blockage as soon as possible. Otherwise, the smoke will continue to build up and could eventually cause a fire. In some cases, you may be able to clear the blockage yourself. However, it’s always best to call a professional for help. They will have the tools and experience needed to safely and quickly clear the blockage, so you can get back to using your fireplace with peace of mind.


So, there you have it. We’ve looked at the possible reasons your pellet stove smokes when starting and what you can do to prevent or fix the issue. Hopefully, this has been helpful and informative. If you still have questions or need assistance with your pellet stove, don’t hesitate to contact us. We’re always happy to help!

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