Hi all,

I have a vaillant TURBOmax VUW 242e or a 282e (according to the
manual, can't find the model on the unit).

It has been wroking fine till this morning. When I switch the Hot
water on, or heating, it tries to ignite then it just shuts down and
trips the switch.

How can I fix it?

I moved into my house 6 months ago and has been working fine till this
morning. The previous onwer said he had few problems with it but after
changing something in it (I think he said a board) it was OK.

Any ideas what might be the cause of the problem & how much it would
cost to fix.

Thanks.