Mine definitely puts out warmer (but still cool) air when I'm not moving, despite the aux fans being on. The output air is, however, considerably cooler since I got the aux fans to work (had a bad resistor).

You can fairly simply check your low-speed aux fan operation by letting the car idle with AC on on a hot day. The fans should eventually come on at low speed, once the pressure in the system is high enough, unless it's low on charge (or there is a problem in the aux fan circuit).

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Steve
'93 400E