Gas heater problems....Andy B

So I decided to light the wall mounted gas heater in the spare room today, it hasn't been used for a while. I went out to fetch Jake from nursery and when I got back the house stunk. Once it had cooled and after removing the cover I found the heater was covered in black soot....

The burner is clean and it is burning blue towards the bottom of the flame but orange at the top. The flue appears to be clear...with the cover removed from in front of the burner the flame keeps changing position, one sec it goes straight up, then back under the baffle which I assume is the fresh air part of the flue, then it comes out of the front cover....

It's a RW Bantam Ecotherm. http://www.cosy-heating.co.uk/robinson_willey_bantam.html

Any tips Andy ?? Apart from get it serviced by a pro

 

Personally Mark I would get rid mate.

If it has sooted up it means that it does not have enough oxy to burn (running rich).Where does the flu go,is the flu used for air supply and products of combustion?Or does it get its air from inside the room?

For the moment mate do not use it as it sounds like it is filling your house with carbon monoxide which will kill within an hour mate.

It's not being used at the moment. I deffo don't want any CO poisoning.

It's a balanced flue, I think I'm gonna have to remove the main heater part and check the flue properly. It goes straight out the back of it through a 9" brick wall and is covered with a terminal guard as it's only about 4 foot from the ground and a couple of feet from a door...

It looks clear from the outside...

It's not old, about 2 years old....

 

What sort of gas meter do you have mate.Does it have a round dial with a red needle or is number digit meter?

Right mate.I need you to run the heater at max,Make sure all other gas appliances are switched off.Go out to your meter whilst the heater is running take a reading of the meter reading all digits and time it for 2 mins then take another reading and subtract one from the other and let me know what that figure is mate.