Find out what you can expect with a service call from cardinal plumbing, heating & air inc by reading our latest customer reviews. Thank you for using wpj heating, we wish you a great day! To request a proposal for boiler service, please. Q how do i know how old my boiler is? Deformed pipework in bedfordshire. Looking back at our positive, problem-free baxi experience, i wish we had converted from oil to natural gas a lot earlier wall-hung.