if the unit fails to sense flame after the trial period

Ensure the 1/4" pilot tubing is clear and the thermocouple is generating at least 8 to 12 millivolts under a closed-circuit load

Designed for high-cycle reliability in residential and light commercial equipment

this model is an automatic reset pressure control

Always verify the KW rating on the original furnace data plate

Belimo G665C Valve Refrigerant if the unit fails toThe Belimo G665C is a professional grade 2. 5 inch 2 way globe valve designed for precise flow control in demanding hydronic systems. Engineered as the direct replacement for the legacy G665 model, this flanged assembly features a CV 65 rating and a pressure compensated design to maintain stable performance across varying differential pressures. The bronze trim and cast iron body construction ensure long term durability in closed loop chilled or hot