My Civic A/C (manual) working very fine when car is idle, or at low speed (or may be at lower gears ratio)
But it stop working at high speed (around 80 km/h) or on higher gear ratio
when outside temperature is fine/lower. it works fine on higher speed/ high gear ration like in the evening/night its freezing chilly
Troubleshooting steps taken so for
Gas refilled, compressor oil refilled
AC expansion valve changed
Radiator and evaporator leakage testing and cleaning
Cabin filter and radiator filter replaced with new one
Nothing worked
generator voltages are checked and found normal
What could be the possible cause and how to resolve it
Thank you !
