Pump tripped, and then took a lot of effort to get primed again. Now operates at 6-8 psi (typically 16-20 psi), motor thermal switch now continually trips every 3-4 minutes. No air leaks, no pipe blockages. Clean filter. Same flow and pressure from both skimmer and main drain. Impeller free and in good shape. All valves clear. Motor sounds fine. Correct voltage at motor. Consistent resistance readings for both upper and lower windings. What could the issue be?
Operating a 1HP Hayward Super Pump 2, manufactured 2017, salt water pool, steady at around 3000 ppm salt.