you should only replace an existing motor with one matching the original RPM and torque profile

Check your existing switch for the part number 1NT21L-2163 or THT2436

Can I use this thermostat for a 4-pipe system

As an OEM replacement capacitor

ASCO 43005437 Coil 322055-301 you should only replace anThe ASCO 43005437 Coil is a precision engineered 24VDC solenoid coil designed for high performance fluid control and industrial automation. As a genuine ASCO RedHat replacement part, this electromagnetic coil ensures seamless integration and reliable actuation for 8238 Series valves and other compatible solenoid systems. Operating at a steady 24 Volts Direct Current, it provides the consistent energy supply required for demanding HVACR and