Estimated boiler repair costs in Ch33 range from the cheapest Boiler repair £70 (H2Flow Gas based in CH43) to the dearest Boiler repair £180 (Lynks Plumbing & Heating based in CH42). This is an average cost, replacing a heat exchanger will be more expensive, a diverter valve less so.
Comparing gas heating engineer estimates for boiler repairs in Ch33 gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - If your boiler is playing up, quickly get rates and quotes for boiler repairs by clicking "Get quotes" to post your job to heating engineers in Ch33
