I recently purchased a 1992 es300 for my daughter pimped it out real nice got it dirt cheap 139,000 on the clock my problem is unless the car is moving the a/c starts to get warm i re-charged with 134 but the problem stays the same and the temp gauge will rise i know alot about cars but the hydraulic fan has me a little baffled there must be a switch to increase fan speed when either temp goes up or a/c is on can anybody help thanks