2003 Alpine Dash A/C

[Buzzbee]

We just charged our A/C Freon system and mechanic found the hydraulic fan is not blowing. How do I find what to check to get the fan to work?
This is a 2003 Alpine with a 400 Cummins engine - 34'.
Help!!!

[Old Scout]

Do a search on "wax valve" on this forum -- about all you need to know about 03 dash a/c systems. HOWEVER--03 and earlier Alpines do not have an interface between the dash A/C's need for air flow across the condenser and the engine fan. There are a number of after market solutions that help to address this design issue. 1- is a electric solenoid fluid control valve for the fan motor control loop. 2- is adding electric fans to the outside of the radiator stack--if you have space. 3- move the condenser and add electric fans--my solution!!!! PM me if you want to discuss this off-line.....
PS--pretty sure your engine fan is keeping your engine cool so its the design issue mentioned above, not the fan motor itself.

[sandy1]

Also source engineering has designed an oriface fitting that is put inline with wax valve hydraluic line that has fan run at approximately 350-400 rpm whenever engine is started to keep air flowing over a/c condenser. Does not effect engine cooling operations. I have installed on several alpines, very simple. Part costs about 40.00 and takes about 15-30 min to install

[sandy1]

Forgot to mention this is fix is for coaches with the wax valve

[wolfe10]

Because the fan does not turn at idle (coolant temperature low), if working on the A/C system, adding freon, etc, Use a hose to mist the condenser with a hose. It works.

[Old Scout]

While moving the condenser and/or adding electric fans is a potential major effort, the bottom line is that I have never liked the idea of relying on a 25 hp engine fan motor to perform the simple act of keeping air moving over the a/c condenser. After the re-design, my dash air now relies on two electric fans, controlled by the compressor clutch circuit, and has never worked better.