Why Heater Reliability Matters More in Boston Than in Warmer Climates
In a climate where the pool season runs from late May through mid-October at best, a heater failure at either end of the season directly reduces the number of usable days in the pool. In Florida or Texas, a heater failure in June is an inconvenience — the pool is still comfortable through summer without it. In Boston, a heater that fails at opening in May or develops a fault in September can cut weeks off the season. This makes proactive heater service at pool opening, rather than waiting for a fault to appear, a reasonable investment for Boston pool owners who rely on heating to extend their season.
The most common failure mode in natural gas and propane pool heaters is ignition system failure. Modern heaters use electronic ignition systems — typically either a pilot ignition or a direct spark ignition — that can fail due to dirty pilot assemblies, failed igniter components, faulty gas valves, or blocked burner orifices. A heater that attempts to ignite and shuts down on a fault code is almost always an ignition or flame sensor issue.