Pentair Mastertemp / Waterco Turbotemp Thermistor

Thermistor or Temperature Sensor for Pentair Mastertemp, Waterco Turbotemp, Sta-Rite Max-E-Therm Gas Pool & Spa Heaters - 200 / 300 / 400 HD models. Commonly corrode, damaging the sensor and causing an E05 fault, or incorrect temperature.

Number 7. in the Diagram. New version is fully stainless steel instead of the chrome-plated brass.

• 2. / 3. / 4. Igniter & Gasket Kit
• 5. AGS Switch 60°C / 140°F
• 6. HLS Switch 55°C / 131°F
• 6b. 45°C Switch
• 7. Thermistor / Temperature Sensor
• 10. Ignition Control Module
• 12. Air Flow Switch
• 13. Main PCB / Control Panel 
• 15. Touchpad Membrane
• 16. SFS Sensor

For other Pentair Mastertemp / Waterco Turbotemp spare parts, click the correct category below:

• Pentair Mastertemp Gas Heater Spare Parts - Water System
• Pentair Mastertemp Gas Heater Spare Parts - Burner System

Pentair Mastertemp, Waterco Turbotemp, StaRite Max E Pro Error Codes: 
Diagnostic LEDs / Error Messages & Causes:

• PS - Check / Replace Pressure Switch. Signifies flow issues.
• HLS - Check / Replace High-Limit Switch/es (faults above 45°C or 55°C) Signifies flow, bypass, governer issues, or other issues.
• AFS - Check / Replace Air Flow Switch. Signifies fan, air flow, or other issues.
• AGS - Check / Replace AGS Automatic Gas Shutoff Switch/es (faults above 60°C). Signifies flow, bypass, governer issues, or other issues. Can also be caused by a 45° Limit Switch on top of the manifold.
• SFS - Check / Replace SFS Stack Flue Sensor (faults above 249°C). High or Low Flue Temperatures are a sign of significant combustion issues, or other issues.
• E01 - Thermistor Fault. Replace Thermistor.
• E05 - General Fault. Needs service. This can be caused by several issues.
• Showing Incorrect Temperature - Replace Thermistor. Check all filters clean. If thermistor shows corrosion, water balance is poor.

42001-0053s