Precise 35+5 MFD Tolerance: Maintains the required phase shift for dual-motor startups

Thermal Stability: Constructed from high-strength alloy steel to resist heat-induced deformation in the combustion zone

it is performing its safety function to prevent heat exchanger damage

When troubleshooting a pilot that won't stay lit despite a clean orifice

Maintains cross-sectional integrity under extreme thermal cycling conditions

Rheem-Ruud SP11700 Thermostat Kit Precise 35+5 MFD Tolerance: MaintainsThe Rheem Ruud SP11700 is a professional grade 120V electric water heater thermostat kit specifically engineered for single element residential units. As the direct replacement for SP12390, this OEM component ensures seamless compatibility and restores factory standard temperature regulation. Optimized for 120 volt circuits, the SP11700 thermostat features a single pole (SPST) high limit control with a 170F safety cutoff and a manual reset button to