cracked back in a cast iron wood heater

St Germain de Tallevende., France   

Our wood heater is working OK but has a crack in the back and it is getting bigger (warping inwards) - thus leaving less room for wood and has a hole which leads outside the box.

This does not seem a problem at the moment and it is sitting inside a brick chimney and I don’t think there is a dangerous problem, but don’t really know.

Obviously it probably needs to be replaced but I am wondering if it is that urgent!

Thanks for any advice you may give.
Jim Bren - an Aussie living in France.


Want to add your response? Please sign-in.

by ChimneyChick | March 05, 2015 ChimneyChick's avatar
Midland, Ontario

I am assuming you have an insert installed within your fireplace.
Once you start to have severe warpage within system it is time to change the unit. Warping occurs when excessive heater deforms the unit and thins the walls. Before the warpage becomes a break, replace the unit with a new system.
If this is a metal heatform fireplace, same issue. Once the metal is stressed and thinned it could crack and break and then the fireplace is non code conforming and requires replacement.

Smoke Signals: Have a question about your chimney?