dh is appalled because they've been here a few times recently trying to make it work and we've spent a few hundred on various other things which needed doing, valves replaced, immersion heater fixed etc.
Yesterday the engineer returned because the ignition lockout had completely locked out. He now says we can pay £400 on parts and £200 on labour and get it mended or face it, stop throwing money at it, bite the bullet, and get a new boiler. He says he could mend it and next week it could collapse again and then more money on parts and labour.
Does that sound about right?
We have no heat til next week regardless 
At least the immersion heater works so we are not cold and stinky.