Funmit 42002-0024S Stack Flue Sensor, 42001-0063S High Limit Switch & 42001-0053S Heater Thermistor – Pentair Spa Heater Replacement Parts

Universal compatibility for Pentair pool and spa heaters

Replace worn parts with a cohesive trio designed to work with multiple Pentair models including Sta-Rite, MasterTemp, and Max-E-Therm. This Funmit kit combines a Stack Flue Sensor, a High Limit Switch, and a Heater Thermistor, all engineered to align with your heater's electrical system. While performance can vary by setup, these parts may help sustain steady operation and consistent readings without buying a full unit.

What is included and how each piece helps

• 42002-0024S Stack Flue Sensor — helps monitor vent conditions and may prevent excessive flue gas output up to 500 degrees F; designed for broad operating ranges.
• 42001-0063S High Limit Switch — detects high water temperature and can open the heat exchanger outlet to prevent overheating scenarios.
• 42001-0053S Heater Thermistor — senses water temperature and contributes to safe, controlled heating within -20C to 80C range.

Quality you can rely on

Each component features stainless steel construction to resist corrosion in humid, equipment-heavy environments. The parts are designed for straightforward installation, with guidance available to video users. They are built to endure typical pool and spa conditions, helping you keep maintenance costs in check when compared with dealer repairs.

Easy installation and DIY savings

• Find a compatible video guide, power down your system, and follow along to replace the trio in minutes.
• Keep gloves handy and handle components carefully to protect yourself and the parts.

Compatibility and fit

The kit is designed for universal compatibility across Pentair Sta-Rite, MasterTemp, and Max-E-Therm pool and spa heaters. Always verify model compatibility before purchasing to ensure a seamless replacement.

Shop with confidence

Funmit stands behind its parts with a customer-first approach. If you encounter quality concerns, reach out to our support team for prompt assistance. This kit is designed to offer a cost-conscious alternative to OEM replacements while keeping performance in mind.