So while in traffic yesterday, I notice the temp needle on gauge moving off center an creeping upwards - i punched up the a/c unit to HI and turned the blower fan on to high - this helped out. Seems the fans (on radiator) are not turning on, also turned the a/c down to LO, compressor turned on but fan action either. Is there a easy way to diagnose (bad relay, sensor, maybe the fans themselves - but to have both not come seems not likely.

Thanks