I have a 1991 bounder, I just got. It has obviously been ridden hard and put away wet. I had the AC worked on with it needing a retro fit and recharge for 740 dollars. Now, 200 miles later, no AC and the temperature control lever springs back to the middle of the temp range from the right, hotter temp area. Any ideas what might be wrong? I see that the cable goes to a box on the passenger side under the hood. I assume something wrong there.
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Need a little additional information. Is it a GM (P30 type chassis?) I am guessing that your control cable is binding a bit and not giving you full travel on the control valve. That would cause you not to be able to keep the heater control valve closed(not letting hot water through the heater core). In that 'box' you are referring to is the control valve itself I believe. On my unit there is no 'box' and I can see the valve clearly. If the cable is okay, there is another 'modification' you can do. You can add a shutoff valve in line with the input to the heater core. In the summer you shut it off and in the winter open it back up. I have done that and it works quite well. I also made sure my control cable is not binding in any way as well.
Hope this helps,
I worked on it some more and found the cable going into the control head on the dash, dislodged. I put it back in and that fixed part of the problem. I still have an intermittent operation of the AC--it appears the compressor is not always turning on. So, I think I am destined for another trip to the mechanic since this is over my head.
I had the AC worked on with it needing a retro fit and recharge for 740 dollars. Now, 200 miles later, no AC and the temperature control lever springs back to the middle of the temp range from the right, hotter temp area. Any ideas what might be wrong? I see that the cable goes to a box on the passenger side under the hood. I assume something wrong there. 
Dave
Linear Mode
