Flue Sensor | Pentair | 42002-0024S (Fits MasterTemp Pool Heaters)

Pentair MasterTemp Pool Heater Stack Flue Sensor, model 42002-0024S, is a critical component for MasterTemp pool heaters, designed to monitor the exhaust flue and support safe, reliable operation. By tracking flue gas temperature and signaling overheat protection, this sensor helps prevent burner shutdowns and maintains efficient heating. Replacing a worn sensor can reduce nuisance trips and sustain consistent water temperature, ensuring your pool stays ready for daily use.

• Model 42002-0024S — direct replacement flue sensor for Pentair MasterTemp pool heaters (exhaust monitoring).
• Monitors flue gas temperature to trigger safe shutdown and prevent overheating.
• Improves MasterTemp heater reliability and reduces nuisance trips during cycles.
• Easy installation with standard wiring harness; designed for compatibility with MasterTemp units.
• Durable, corrosion-resistant construction built for high-heat, humid pool environments.

Order now to keep your MasterTemp heater running safely and efficiently.