A common sign is the system being "stuck" in one mode despite 24V being applied to the coil

the QCR2060 is a bolt-on

this definite purpose contactor is the direct OEM replacement for aging or pitted components that lead to compressor short-cycling or failure to start

If the integral seat in your 2E trap is pitted

An external equalizer TXV like the VAL8608 is required whenever there is a distributor or a high pressure drop between the valve outlet and the evaporator outlet

Siemens Building Technology 265-1024 Valve 328140-751 A common sign is theThe Siemens Building Technology 265 1024 is a professional grade, two position 3 way electro pneumatic valve specifically engineered for high voltage commercial HVACR control systems. Operating at 220 240V AC (50 60Hz), this Model 3 E P valve serves as a critical interlock between electrical signals and pneumatic actuators, facilitating the seamless control of air flow to dampers and valves. Housed in a durable NEMA 1 equivalent junction box, the unit