this occurs because the restrictor tee is missing or clogged

as it monitors for flame rollout or excessive heat buildup near the combustion chamber

High-Temperature Durability: Constructed with a high-grade steel rod and robust porcelain insulator for long-term thermal resistance

Can this switch be used in systems requiring different WC ratings

Nordyne 920920 Blower Board Els PW 17895 this occurs because the restrictorWhen you are dealing with a dead blower or inconsistent heating cycles in a Nordyne furnace, the Nordyne 920920 Blower Board is the task specific solution needed to restore proper sequence of operation. This is a genuine Nordyne OEM board designed to interface seamlessly with MG2S series gas furnaces and related two stage PSC blower configurations. Whether you are replacing a failed relay or troubleshooting a system that is short cycling due to logic