look for the 260603 or equivalent

which allows for a manual reset if a trip occurs

and RPV350 models

This specific model supports local sensing and is built with high-temperature tolerant components to maintain stable burner sequencing

A common symptom is the indoor blower running while the burners or compressor fail to engage

Belimo B347 Valve mario look for the 260603 orThe Belimo B347 is a high performance 2 inch 3 way characterized control valve (CCV) engineered for precise modulation in hydronic HVAC systems. Designed with a 29 Cv rating, this valve features a nickel plated forged brass body and a stainless steel ball and stem, ensuring long term reliability in both chilled and hot water applications up to 250F. The A port provides an equal percentage flow characteristic for linear heat output, while the B port is