What does a pool heater repair typically cost?

Pool heater repair costs on Long Island vary widely by fault: service call + diagnosis is usually $150–$250; common repairs like igniter, thermocouple, or pressure switch replacement run $300–$700 including parts; a cracked heat exchanger (most common failure on older gas heaters) is $1,200–$2,000 to repair, at which point many homeowners choose to replace the whole unit.

A new residential gas pool heater installed runs $3,500–$6,500 depending on BTU size (250k–400k BTU is typical) and gas-line work needed. Heat pumps cost more upfront ($4,500–$8,000) but have lower operating costs in moderate weather.

Heat exchangers often fail from poor water chemistry (low pH is the main culprit). Running chemistry strictly can double heater lifespan.