the iO-CS70WP is a fixed-point

it must be replaced to prevent safety switch lockouts

functioning as a primary high-limit safety to prevent heat exchanger damage and hazardous overheating

it is specifically designed for the mounting brackets and housing found in Trane and American Standard equipment

Lennox 40L87 Relay 323269-701 the iO-CS70WP is a fixed-pointThe Lennox 40L87 Relay is a specialized 24V SPDT switching relay engineered for heavy duty HVAC sequencing and control applications. Designed to handle the rigorous switching demands of Lennox residential and light commercial units, this electrical component facilitates seamless signal routing between thermostats and air handlers or heat pumps. This replacement HVAC relay serves as a direct substitute for numerous legacy control components, ensuring