The Series 740 features iron body construction and expanded outlets specifically for high-capacity hot water space heating

If the pressure switch fails to stay closed despite a clear flue

its primary design function is as a safety limit to prevent catastrophic coil damage from freezing

Zero Differential Operation: The direct lift design allows the valve to function reliably even at 0 PSI

the 52CQ402474 is the direct manufacturer-specified replacement for the 52CQ400014 assembly

Carrier HC40GQ236 Motor 326058-755 The Series 740 features ironThe Carrier HC40GQ236 Motor is a high performance direct replacement for HC40GR236, engineered specifically for demanding condenser fan motor applications in residential and light commercial HVACR systems. Operating at 208 230V on a single phase (1PH) power supply, this 1 4 HP motor provides a steady 825 RPM to maintain optimal heat rejection across the outdoor coil. Built with a PSC (Permanent Split Capacitor) design, it features internal thermal