i have a 2004 lexus rx 330 with ok get this 284,000 miles and it just started to lose cool air with the air conditioning on while driving and especially when stopped .then as soon as i start to drive the air would come back on and i noticed my temp gauge started to climb,then it would go back down and it started like the fan wanted to go on which it did then shut off like it was not runnign correct.has anyone had this issue and if so help.. could this be a thermostat prob or a fan issue ..thanks for the help in advance

 

Start with something simple. First check the coolant level in the radiator when the engine is cold. It may be low.

Posted by Mesquite77 in another thread:

Steps from service manual, key is to fill it at radiator filler neck on driver's side, be careful, that is the hot part...
1) Loosen upper drain plug
2) Put a clear vinyl tube on vent plug located on upper drain plug
3) Fill radiator at filler neck (not overflow tank) until vent tube full
4) Install radiator cap, tight
5) Fill reservoir overflow tank
6) Warm up engine and while it is running squeeze the inlet and outlet radiator hoses by hand several times
7) Stop engine and let it cool
8) Remove radiator cap and check for fluid level in radiator

9) If coolant inside radiator (not overflow tank) is not to full mark, repeat steps 1-8 until it is
10) Top off reservoir tank if needed.