I just bought my first Jeep (05 Willy) after many yrs of waiting.......I noticed that the A/C only works on Max. Cold on top vents but medium cold on the bottom. When I change it to Max - 1 no air comes up from the top or bottom. I hear the fan working and the compressor. any ideas?
The resistor pack is what gives the fan its multiple lower fan speeds. It uses resistors to reduce the voltage to the fan motor for all of the lower fan speeds, with no resistor used for the highest speed fan setting. Can you hear the fan running at the lower settings or just the highest setting? If it runs at lower speeds too but just no air comes out of the vents, it's likely you have bad door controller which is how air is routed between the defroster, dash vent, and floor vents. Older TJs like mine use vacuum to control alll that but newer TJs like yours do it differently and I'm not familiar with that part of the newer TJ's HVAC system.
It'd be a bad resistor pack only if one or more of the lower fan speeds were inoperative with the highest fan speed working ok.
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Usually when the speed controls wont change the first thing that goes is the actual controller. Is it digital or analog?
* New Jeep *
6cyl 5 speed
4" Rough Country Lift
2" Skyjacker Body Lift
ARB Front bumper
2 IPF Fog Lights
Dick Cepek DC-1's
Full Audio system