I know it’s a bit late now, but may be worth taking out a monthly plan to cover any future failures. You can get different types, EDF charge around £13 a month with unlimited call-outs, others charge £3-5 with a call-out fee. We had an Ideal boiler and cover with British Gas, they got fed up of us calling them out 3 times a year, in the end they installed a new Bosch boiler for £1700, we got interest free credit over 2 years.