Answer
Mar 27, 2026 - 10:00 AM
Your pool heater may turn on but not heat due to issues like a dirty filter restricting water flow, a faulty thermostat, or low gas or electricity supply. Additionally, problems with the heater’s internal components, such as a malfunctioning igniter or heat exchanger, could prevent proper heating. It’s best to check these areas or consult a professional for diagnosis.
