FAQ

Fulmination

During heat-up and cool-down, most wood-burning stoves make a ‘ticking’ sound, and this is known as fulmination. In some cases, the normal ’tick’ can give way to a few louder bangs. This can be attributed to the fact that, in relation to the welding of the wood-burning stove, points of tension have been created in the steel construction. These points of tension are released during warm-up and cool-down phases.

  • In some cases, these points of tension can be removed by firing the wood-burning stove up quickly
  • The heat shield behind the door is loosened, and then tightened again
  • If the rear outlet is blocked, the seal is loosened and tightened again
The lacquer peels off

The lacquer can peel off if the metal surface of the wood-burning stove, if, for one reason or another, it was not completely clean before it was painted. If the lacquer peels off, you can lightly scrape the surface and spray-paint it with Senotherm.

If, over time, the stove becomes cracked, chipped, etc., it can be repaired in the same way.

Repair kit – merchandise number: 200 ml: Black: 22-0756; Grey: 22-0756grey

The paint is sprayed on several times in as thin a layer as possible to ensure greater durability.

Can the wood-burning stove rust?

If stored and connected correctly, a wood-burning stove will not rust.

When a wood-burning stove rusts, it is often the result of it being exposed to moisture from the chimney. The risk of internal rust can be minimised by firing up the stove a couple of times during the non-heating seasons, which will ensure that it is dried throughout.

This is particularly recommended in summer houses where the inside temperature is often low during the winter, because the temperature in the wood-burning stove's combustion chamber can drop so low that stagnant air condenses, leaving water on the stove’s metal surface. This water can cause rust.

To prevent this, we recommend ensuring a through draft in the wood-burning stove, possibly by allowing the air supply to the stove to remain slightly open during the winter.

As a rule, external rust occurs when the stove has been stored in a damp environment where moisture is able to form on its surface.

Should this occur, a repair kit is available, which contains sandpaper and spray-paint.

Repair kit - merchandise number: 200 ml:
Black: 22-0756; Grey: 22-0756grey

Vermiculite cracked/broken

The skamolex sheeting in the combustion chamber is made of vermiculite, which is a specially designed material that can withstand heat and insulate efficiently. Both optimal temperature and combustion in the combustion chamber are thereby ensured.

The material is porous, and it cannot withstand jolts or blows.
Cracks are most often caused by the material being struck by a piece of firewood or the like. However, the material's insulating effect is not adversely affected as long as the sheeting remains properly positioned in the stove.

The sheeting should be replaced when it is worn down to approximately half its original thickness. Otherwise, it will no longer insulate optimally, and it is therefore not able to ensure the proper combustion temperature, nor is it able to protect the wood-burning stove against the high temperatures in the combustion chamber.

Glass in the wood-burning stove is cracked/broken

The glass in the wood-burning stove is a special ceramic glass that can withstand very high temperatures.

At high temperatures, as well as during warm-up and cool-down phases, the glass is especially sensitive to jolts or blows. If the door is slammed forcefully, or if the glass is exposed to other impacts, there is a risk that it may crack.

Should this occur, a glass set is available, which contains glass, sealing compound and an installation guide.

How can I prevent the glass from turning white?

White glass can be caused by faulty operation, such as:

  1. Glass not cleaned sufficiently
  2. Burning milk cartons, newspaper advertising material, etc.
  3. Stoking with unapproved fuels, such as coke and the like, which creates too much heat.
  4. Stoking with impregnated tree or pressed wallboard
  5. Excess chimney draft
  6. Stoking with the ash pan open.

If the glass turns white or opaque and cannot be immediately cleaned, it may have been permanently damaged.

The glass in the wood-burning stove is a special ceramic glass that can withstand very high temperatures. At high temperatures, however, the glass is very sensitive to chemicals. Burning advertising materials, newspapers, impregnated wood, etc. can ruin the glass.

Should this occur, a glass set is available, which contains glass, sealing compound and an installation guide.

How do I prevent the glass from becoming sooty?

Sooty glass can be caused by the following

  1. The wood is not sufficiently dry (max. moisture content is 18% water)
  2. The ’pane flush’ function is not active (check the control device)
  3. The ’pane flush’ function is out of order (this can be the case with an uneven accumulation of soot on the pane, and the door should be inspected for repair)
  4. Insufficient chimney draft (can be measured by a chimney sweep)
  5. Insufficient combustion temperature. This problem is solved by adding more air to the combustion through the primary air supply control. A sufficiently high combustion temperature is reached when the vermiculite sheeting is completely clean.
How should I clean the glass?

The glass is most easily cleaned using a damp paper towel dipped in ash. This removes caked-on soot quickly and easily. If so desired, a bit tougher glass-cleaning solution can be used.

The handle is loose

On newer wood-burning stoves, the handle can be tightened with an Unbrako key through a hole in the heat shield. First, the counter-pivot screw in the handle is loosened and then tightened again.

The gaskets are loose/fall off

The small gaskets around the ash pan and the like are fastened with a heat-resistant adhesive. However, they can become loose or fall off over time. They are easy to replace.

Repairing small cracks and bumps

First sand the surface with sandpaper number 80 until the scratch is no longer visible. Use a wear pad so that the surface remains even.

Sand the surface with sandpaper number 240 or 320 (use water for a smoother surface).

All stones for the same wood-burning stove can be sanded with sandpaper number 320 so that the surface remains even.

How do I heat up a stove with soapstone for the first time?

A soapstone must be made accustomed to the high temperatures to which it can be exposed in the wood-burning stove. We therefore recommend the following procedure:

The process includes three heat-up and cool-down periods. The temperature rises with each firing, by which the soapstone dries more and more, and its tension is thereby released. If the stone is heated up too quickly from the beginning, it may crack or break.

How do I clean the wood-burning stove’s soapstone?

Grease spots and the like can be washed away with a neutral cleansing agent.

  1. Make sure the stone has cooled to room temperature before cleaning
  2. Dampen the stain with undiluted cleansing agent and allow it to work for a few minutes
  3. Wash the surface with warm water
  4. Diluted acetone can be used with caution on difficult stains
  5. The stain can also be sanded using sandpaper number 240 or 320. For an especially smooth surface, use water and moist sandpaper
How do I prevent a partial vacuum in the room?

Excess smoke can occur when there is a partial vacuum in the room in which the wood-burning stove is located. This can be caused by heat recovery in low-energy houses or with powerful suction from exhaust hoods.

If this happens, smoke will come out into the room when the door is opened because of the excess pressure in the wood-burning stove in relation to the room in which the stove is located. In this situation, it is necessary to get the house pressure-equalised, in which the partial vacuum in the house does not exceed 4 Pascal.

How do I prevent tarry soot from accumulating in the wood-burning stove?

Tarry soot is caused by insufficient combustion temperature and/or wet wood.

Tarry soot increases the risk of chimney fires.

Tarry soot can be recognised as a brown, sticky coating on the stove’s surfaces.

Low combustion temperature occurs when there is insufficient primary air during the lighting phase in relation to the quantity of wood used.

Draft regulation problems

Poor chimney draft can be caused by defective bimetal springs. Remove the back plate and ensure that the bimetal springs are functioning properly.

The adjustment knob can sometimes stick due to balls from the cleaning process, dust in general, or it may be overly tightened. This can be solved by loosening the nut that holds it in place.

How should I clean the wood-burning stove?

Maintenance of the wood-burning stove should only be performed when it is not in use/cool.

The easiest cleaning method is to vacuum the outside of the stove with a small nozzle with soft bristles, or to dust it with a dry, soft cloth (Only use a dry cloth).

Do not use alcohol or other solvents, as they will remove the paint.

Smoke enters the room when the stove’s door is opened

Smoke will always opt for the easiest way to escape, which should be through the chimney. However, low chimney draft or partial vacuum in the room can cause the smoke to come out through the opened door. Extremely low chimney draft can cause smoke to seep out through a closed door.