0635 orifice size is mandatory to maintain the design BTU output and prevent unsafe combustion characteristics

5 MFD capacitor

Always verify the root cause of the thermal trip—such as a failing blower motor or restricted ductwork—prior to installation to ensure reliable system operation and to avoid repeated component failure

ensuring a leak-proof seal in high-vacuum and high-pressure environments

Utilizing OEM Watts pneumatic parts like the 0888596 repair kit preserves the original flow characteristics and structural integrity of the regulator body

Nordyne 626508R Limit Switch 0635 orifice size is mandatoryThe Nordyne 626508R is a critical high limit safety component designed for residential gas furnaces and air handlers. This L250 40F limit switch acts as a primary safety sensor, monitoring the heat exchanger and plenum temperatures to protect the system from thermal damage. Factory calibrated to normally closed (NC) specifications, the 626508R Auto Limit Switch will open the circuit to interrupt the burner if temperatures reach the 250F cut out