Repair of wood-burning stoves

Brick/vermiculite panels can crack due to wood impact. Although cracked, they do not need to be replaced. They still insulate the combustion chamber.

The bricks are used to insulate the combustion chamber to increase the combustion temperature. However, if they start to crumble, the insulation disappears. This can damage the cast iron parts, in which case they must be replaced.

Is it unusual for my stove to chirp?

A slight chirping sound is normal when the stove heats up or cools down.

The chimney contains soot. How did this happen?

If the temperature is too low, viscous soot can form in the chimney. The combustion temperature will be too low if the air supply is insufficient for the volume of wood. Viscous soot is easily recognisable as a brown sticky layer. Increase the secondary air supply to raise the temperature.

A thermometer for the stove flue, mounted in the lower part of the pipe, will indicate whether the air supply is adequate. The flue gas temperature must be about 250 °C. If the temperature is much lower, viscous soot may form in the flue. If the temperature exceeds 250 °C to 300 °C, the internal parts may be overheated.

Smoke enters the room when I open the stove door. How can I avoid this?

The stove must never be used with the door open – only open the door fully when refuelling. Smoke may enter the room during refuelling if the stove is burning very weakly. To avoid this, either set the stove to full combustion or open the door slightly (1-2 cm) for a few minutes before adding more fuel.

If the door is left open for too long (about 2 minutes) during refilling, a lot of cold air can be drawn into the chimney, cooling the smoke and slowing down the draft. This causes the smoke to return to the room – keep the recharge time as short as possible.

If smoke still appears, the stove is difficult to light and it is difficult to maintain a good burn, there may be a problem with the flue draught, in which case consult your installer or a qualified flue cleaner.

The chimney does not have sufficient draught. What can I do?

If the flue is too short, has insufficient insulation or is leaky, it can cause problems – consult a chimney sweep to check and measure the draft.

If the above problems persist, extend the ignition time to allow the flue to warm up properly. The draft in the chimney will be higher when it is hot. This is achieved by using a large number of glowing saplings and 1-2 igniters. After lighting the igniters, leave the stove door slightly open, about 2-3 cm, for 5-10 minutes. When most of the flame has died down and enough glowing embers have formed, add 2-3 dry logs and keep the air supply open.

Slower draught chimneys may need to open the door again a little before the wood is fully ignited. Once a good flame has formed and the door is closed, the air control can be set as desired.

If you have an old brick chimney with a large internal diameter, it may be useful to reduce the area of the chimney by using a liner. Consult your local HETAS engineer Morsø dealer or a chimney sweep.

Where can I buy spare parts for my stove?

You can buy parts from your local Morsø dealer. If you are not sure which type of stove you have, you will find the casting number inside the door. This number identifies the Morsø stove. All Morsø stove parts are replaceable, and we guarantee that Morsø parts will be available for at least 10 years after the stove is discontinued.

2B Classic – the distribution board burnt to pieces. Why did this happen and can it be replaced?

The distribution plate is a wearable part that needs to be replaced as needed. Morsø cast iron stoves have a very long service life if the wearing parts are replaced in time. If too much primary air is passed through the grate shaker, the temperature in the combustion chamber becomes very high, which can shorten the life of the distribution plate.

Another cause could be the accumulation of ash and soot on the top of the plate. Soot and ash should be cleaned 1-2 times a year, which can be done with a brush or Morsø ash tool.

Replace the distribution plate in the 1400 series

The distribution plate is a wearable part that needs to be replaced as needed. Morsø cast iron stoves have a very long service life if the wearing parts are replaced in time. If too much primary air is passed through the grate shaker, the temperature in the combustion chamber becomes very high, which can shorten the life of the distribution plate.

Another cause could be the accumulation of ash and soot on the top of the plate. Soot and ash should be cleaned 1-2 times a year, which can be done with a brush or Morsø ash tool.