Boiler Repair London. If you require cost effective, reliable combi boiler heating and plumbing engineers for repairs, service or installation then look no further. We cater to all domestic and business customer’s central heating systems, gas services & plumbing requirements. Call us on 020 8402 0034 to book a free quotation. If you know exactly what you want done, we will arrange a visit for your boiler repair at your convenience.