So this the symptom, in the summer I almost always have to run the air conditioning, reason being when the the air conditioning is off, and I am letting ambient air through the dash vents (not top vents, I realize those are fresh air) I talking the vents that are across the dash, even if I have the vent temp tuned to cold (air off) fairly warm air comes through the vents. Even if its like 65-75f outside I get heated air. And in winter, if I have the temp turned to warm, I get great hot air, EXCEPT when I let the van go to idle, then it turns cold, however if I rev up the engine, then the hot air comes back. I'm wondering to I have a thermostat issue? Or could it be a vacuum thing? Not really knowing how this whole heat/air system works I can only guess.
I have noticed when i start my van, I hear a hissing sound, but I can figure if that's just a normal sound, there seems to be an awful lot of plumbing on this motor...can anyone share an opinion?
I have noticed when i start my van, I hear a hissing sound, but I can figure if that's just a normal sound, there seems to be an awful lot of plumbing on this motor...can anyone share an opinion?