Dash Air Conditioning

phnguyk wrote:

dougrainer wrote:

Mr.Mark wrote:
I might be mistaken but A/C is A/C whether it's in a class A diesel or gas unit, right? We can run the dash A/C up to about 95 degrees outside. After a prolong period of that temp, the rear starts to warm up from the engine heat.

Anything over that temp I'll crank up the genny and run all three air conditioners. It's nice to arrive at our destination with the interior cooled off on a hot day.

MM.

Yes, you are mistaken. Rear Engine Diesel will get colder than a Gas engine front. The reason is the gas engine heat of the forward compartment and the fact that the Condenser FOR the AC is installed in front of the Gas Engine Radiator and Gas engines run hotter than Diesels. Also, the Condenser for most Diesel's are separate from the radiator and even if part of the radiator, the Diesel runs cooler and the ability for a Condenser to remove the heat from the AC coolant and the better it does that is a big factor in how cold a Dash AC will get. Doug

That's the craziest thing I've read in a while. Diesels run hotter, that's just how they run. My v10 never goes over 170, I'm sure your diesel is running hotter than that. The only reason your diesel gets colder has to do with the physical size of the components.

OP, you should see anywhere from 55-65 degrees right at the vent regardless of exterior temperature, put a thermometer in a vent. Any higher and there's a problem, freon, leak but something. Common problem on the f53 is the heater hose valve not shutting completely, google it, replace with a manual valve shut it in summer open it in winter.

One way to troubleshoot it is, does your fan speed change when switching from a/c to max a/c?

Doug, you are the mechanic, I am not. But, my radiator temp runs about 197-199 and the transmission 205-207 on a normal day. I know that my air conditioning components are separate but a diesel runs pretty hot when rolling down the road. When at idle, they will cool down really good.

It sounds like our components are the same but just located in different spots.

So, I'm half right, right? LOL!
MM.