Initial water/coolant fill for older GX cs4 and cs4-I compressors manufactured before March 2025

The radiator on the cs4 and cs4-i has the inlet and outlet water tubes on the bottom. This can create an air pocket at the top of the radiator. 30 seconds to clear this out, and you can see significant water temperature drops. Keep your cs4 and cs4-i models running and running properly with this very simple step. Newer GX compressors no longer need to do this as they did change the radiator position. This was done sometime in early 2025.