Front AC cold, rear AC warm,? (3 Viewers)

[Chaser503]

I've just replaced front evaporator and expansion valve, vacuumed, and charged. Front AC blowing cold.

When I turn on rear AC, it blows warm. I quickly turn it off in case there's a leak and I'll lose my refrigerant and then front AC will stop working, too. So long as rear AC stays off the front continues to blow cold. Is this a common issue? What's the likely culprit?

2005

Thanks!

 

[Eyedaho]

My guess would be a failed expansion valve on the rear evaporator.I don't think there's actually any isolation valve for the rear AC, but I could be wrong.

 

[SteveH]

There is a single compressor for both systems, so the high and low sides are connected throughout. I suspect @Eyedaho is right or that some other rear A/C component is bad.

 

[Trunk Monkey]

What are the controls above the second row set to?

 

[Chaser503]

Rear controls set to cold / AC / high