Grundfos 00595657 Aquastat 320788-704 the furnace will likely display

the furnace will likely display a diagnostic code and fail to ignite

the EWC NCM-3ZL is a dedicated 2-3 zone controller

and all necessary body bolts and O-rings required for a full internal rebuild

For contractors seeking a rugged Johnson Controls replacement temperature switch

This kit typically includes the propane-specific orifice

Grundfos 00595657 Aquastat 320788-704 the furnace will likely displayThe Grundfos 00595657 Aquastat is a high temp thermostatic control kit specifically engineered for UP Series circulator pumps. Designed for professional hydronic heating and domestic hot water applications, this 3 4" clip on aquastat mounts directly onto 7 8" OD copper tubing to ensure precise thermal management. The bi metallic, snap acting disc provides responsive control, activating the pump when temperatures drop to 105F and deactivating it once