I have a baxi solo 2 pf30 with what i can only describe as a helicopter whirring noise coming from the top of boiler which is very noisy also sounds like a scraping noise this is the first problem,the 2nd being every now and then the clicking on and off of the igniter trying to light the boiler this can take a couple of minutes i have noticed there is a split in the casing that houses the led lights and thermostat could someone please advise me i would be very grateful, thankyou