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71C10Guy · 08-10-2017, 04:05 AM

So I have been in the process of completely redoing the ac on my 71 C10, and I have a few questions. The first, which I am working on right now, is what the hell is this thing?? It seems to be a low pressure switch? I'm not sure but I haven't replaced it because I don't know what it is or does, and needed some help. Also, I have been trying to blow through the system with air and it is getting blocked somewhere by the evap, I'm thinking that that switch, or the valve in the second picture is closed and not letting anything through. Any help would be appreciated. Thank you.

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08-10-2017, 04:05 AM	#1
71C10Guy Registered User Join Date: Jul 2017 Location: Dripping Springs Posts: 39	71 c10 ac questions So I have been in the process of completely redoing the ac on my 71 C10, and I have a few questions. The first, which I am working on right now, is what the hell is this thing?? It seems to be a low pressure switch? I'm not sure but I haven't replaced it because I don't know what it is or does, and needed some help. Also, I have been trying to blow through the system with air and it is getting blocked somewhere by the evap, I'm thinking that that switch, or the valve in the second picture is closed and not letting anything through. Any help would be appreciated. Thank you. 1st Pic 2nd Pic 3rd Pic Last edited by 71C10Guy; 08-10-2017 at 12:43 PM.