the internal fusible link or bimetal disc has failed

and 752 units

ensure the pressure differential does not exceed the valve’s MOPD rating

check your controller's technical manual for port compatibility

Nordyne 903476 Heat Exchanger 340155-7026 the internal fusible link orThe Nordyne 903476 Heat Exchanger is a genuine OEM replacement part designed for specific Nordyne gas furnaces and HVAC systems. In the field, compromising on HVAC heat exchanger replacement can lead to dangerous rollout or carbon monoxide leaks. This Nordyne replacement part is engineered for high thermal conductivity and precise structural alignment within the combustion chamber, ensuring seamless heat transfer efficiency. Whether you are servicing