average price for a pool heater repair
1 According to HomeAdvisor.com, the average cost nationwide to repair a swimming pool heater is about $400 to $600.2  Based on the type of repair and local pricing, however, actual repair costs could be significantly higher or lower. 3  A recommended annual pool heater tune-up costs $100 to $200.eated pools allow for a longer swimming season than non-heated pools, but they have a higher cost of ownership. In addition to the fuel needed to run a swimming pool heater (at least if itâs electric or gas; free-energy solar heaters are also available), mechanical upkeep is also required.