Raypak 006872F Rocker Switch Where is this sensor located

Where is this sensor located in the unit

including PG8HAA units and 58RAV series furnaces

Automatic Reset Functionality: Automatically restores the circuit once the plenum temperature cools to 110°F

System Protection: Rapidly opens the circuit at 135°F to prevent overheating and protect the heat exchanger from cracks or fatigue

Raypak 006872F Rocker Switch Where is this sensor locatedThe Raypak 006872F Rocker Switch is a critical SPST (Single Pole Single Throw) component engineered specifically for Raypak pool heater control boxes. Designed for on off power regulation, this heavy duty rocker switch ensures reliable electrical continuity within the 120V 240V control circuit. It is a direct OEM replacement for Raypak 206A 406A heaters, as well as the Raypak Gemini and Versa series. When troubleshooting a pool heater that won't turn