What was the difference between the 174031-013 and this 174031MF-013 model

Relying on OEM Honeywell recorder pens prevents the bleed-through and tip degradation common with generic alternatives that can compromise the accuracy of paper-based documentation

this 4-stage heat pump controller provides seamless communication between the thermostat and system components

this UL-recognized component simplifies field wiring and ensures a secure

Carlyle 06EA660143 Valve Plate 321894-708 What was the difference betweenThe Carlyle 06EA660143 Valve Plate is a high performance, refrigeration duty replacement kit engineered for 06E Series compressors and 06CC Compound Cooling models (50 to 99 CFM). Designed to withstand the thermal stresses of low temperature refrigeration and industrial HVAC applications, this genuine OEM Carlyle valve plate ensures optimal compression efficiency and gas flow regulation. This specific assembly is a 2 discharge port configuration,