PCB replacement for boiler

Hi- I have to have the PCB replaced in my gas boiler- have been quoted €420 by the engineer, already paid him €90 to diagnose the problem- not sure if €420 includes fitting as well. is it possible to buy own PCB as they seem alot cheaper on line than €420- anyone got any advice on this?

You will get a much better response if you post your question in the right forum. Accordingly I am closing this post but do feel free to repost once you have read the guidelines. They are designed to help you get the best answer to your question.