Carrier 338085-758 Switch 322838-753 the Raypak 012845F is specifically

the Raypak 012845F is specifically engineered for the 2-stage logic of Raypak control boards

you know that dielectric union repair is critical for preventing galvanic corrosion between dissimilar metal pipes

an infinite (OL) reading indicates a failed relay coil

As a standing pilot gas valve

below the oil level

Carrier 338085-758 Switch 322838-753 the Raypak 012845F is specificallyThe Carrier 338085 758 Limit Switch is a critical safety component designed for precise temperature regulation within high efficiency furnace systems. This L210 20F limit switch is engineered to monitor heat exchanger temperatures, effectively tripping to interrupt the burner circuit if the internal temperature exceeds the 210 degree Fahrenheit fixed setting. It features a 20 degree differential for automatic reset, ensuring the blower fan continues