Personally I can't see how a fault with the gas valve and the gas thermostat could cause sooting up.
Sooting is virtually always caused by a burner fault, when gas burns without enough air you get a yellow flame and it's the yellow flame that produces the soot due to incomplete combustion. It also produces carbon monoxide, it's lucky you had a CO detector...
If your other gas appliances are burning with the correct blue flame then you don't have a problem with your gas being contaminated or the pipes sludged up.
It seems to me that you have paid more than enough to get your fridge serviced and have a right to insist that it is put right without further charge.
AndyC
As the OP states, the fridge was working perfectly on gas before it was "repaired" and the only thing that could logically have caused incomplete combustion would be wrong jet fitted, unless of course another unmentioned incorrect part or parts were fitted.
£300 suggests a fair bit of work should have been carried out.
Hi, thanks for the replies I also thought they may have fitted the wrong jet but according to the engineer he gives electrolux the model number and they send the right jet, to my knowledge he hasn't double checked this, he just keeps coming up with different faults, he is never wrong by the way, not a nice man, my other appliences on the van are working perfect, I did tell him in my last phone call I was going to take it further his reply was go ahead, unless we pay again he will not look at the fridge again, perhaps my only option is to take it else where and get a report made to see if some of the parts we have paid for where un necessary, unfortunately it will cost more money again or I could name and shame him but is that legal?
Just a thought. If he was working on a gas appliance he has to be gas safe registered (used to be Corgi). Get his name, ask to see his gas safe license, if he reufuses, phone gas safe and tell them your saga and where this person works. They take ALL complaints very seriously and he could end up losing his license if he doesn't put things right.
This would certainly be the case if it was domestic gas, only thing I'm not sure of is that it is the same for motorhomes / caravans etc.... I suspect it is as gas is a very dangerous thing to be messing about with.
May be a new tack for you to pursue?
corgi or now gassafe as it is doesnt cover m,homes .they do cover houses and caravans but if you look on their webb site it very plainly says not cover m,homes.corgi never covered m,homes either . there is some courses but there is no regulation to be certified only a compedant person . so no go there i think. but you could try anyway.
cheersalan.
as gassafe dont have a qualification to work on motorhomes not for hire or reward . they are no more competant than me or you.as long as you are competent. right load of crap it is, you need cops to be qualified .on m,homes . and gas safe dont have to have them .neither did corgi. like i say there are very few that have a qualification to work on them thats valid.cheers alan.