Yeah I think the shut off maybe makes it more efficient so I'm not opposed to doing that. I don't know that it helps cooling the motor very much considering the size of the engine and how small that area is under the dash but I think on other cars like small cars or even trucks that can help cool the motor sometimes you're having an overheating problem you can run the heater I think I've done that before. But you're right about the low pressure thing and I think that's actually the major indicator. I have a feeling something's broke loose maybe with that dryer or something and it's plugged up the system in some way. That being said I'm told that 20° from ambient Air temperature is a great drop somebody said something about intake air temperature well let's just say that that is the same as the outside air temperature even though it hasn't been tested once you get some cooling in the cab at your feet let's just assume the temperature is the same I haven't read it but it probably is very close cuz it's blowing out and then you have the whole camper and until you're running the air conditioner in the camper it's probably some pretty warm air going into the intake vents I assume on the floor I don't really know if that's a heating vent or where it intakes exactly but assuming it's on the floor somewhere that's probably at least the same temperature as it is outside. It does cool a little better when the camper temperature is lower running the generator cooling the entire camper. Then you get a cooler sort of feel but a lot of that is because the entire camper is cooler anyway.
But if you're supposed to be getting readings like the RV guy said of 35° I just don't believe that I think coming out of that thing during the summer you'll be lucky to see 45° maybe 52 anywhere in the USA down on the lower 48 anyway I don't see 35 I mean unless you're running the air conditioner in the winter Maybe... Maybe 20° drop is the answer if it's 85 outside and it's blowing out at 65 I should be happy but it sounds like it should be cooler than that and I think it should be coming out in the 50s anyway and so therefore that kind of indicates a problem in my opinion.
I am going to probably do the diverters to block that the only have to do it one way like one valve to stop it from flowing in or do you have to put it on both sides? Also any comments about the above with the air temperature thing am I misunderstanding that I mean if it's 20° I should be good then there's absolutely nothing wrong but then why the pressure problem I think solve the pressure problem by whatever is causing that and I get better temperature out of the dash.