I ordered this pcb after being told that the board in my boiler was the reason why my boiler wasn't working. It was £300 cheaper than a new pcb. It arrived on the day expected. I fitted it quite easily and it has been working well for two weeks. Marvelous. I thought that I was going to need a new boiler because of the price of a new pcb. Why would you pay that amount when something else could easily go wrong with an old boiler.