A plunger and and bit of arm action! The cons of a combi boiler are. Receive exclusive offers before anyone else! Your account, who has to pay, banding, how it's calculated, discounts & exemptions, how we spend it. Don’t let a leaking faucet raise your water bill we’ll provide a solution on the first try! Our services for boiler maintenance / boiler repair include. Whatever your choice, it’s essential to shop around and speak to as many installers and providers.