Accessing Dash A/C Evaporator and Expansion Valve

The friendliest place on the web for anyone with an RV or an interest in RVing!
If you have answers, please help by responding to the unanswered posts.


Well-known member
Mar 3, 2017
NW Illinois
Diagnosing my dash A/C problem led me to a bad Expansion Valve. I looked high and low on the web for instructions on getting to this part but couldn't find anything. It appeared that it may be a major undertaking. After digging into it the job proved to not be so bad.

Here's what it took:

1.  Remove Passengers Captain Chair - 4 bolts.  (May not be absolutely necessary for younger, more nimble bodies!)

2.  Remove Passenger Table and Drawer - standard drawer slide release clips. (Gives better access)

3.  Remove Passenger Kick Panel - 4 screws and 120v outlet.

4.  Remove Evaporator Coolant Lines - access from under the front hood. (Assuming here that you have legally removed the 134a.)

5.  Unplug numerous harness connectors around evaporator housing

6.  Remove 5 screws around evaporator housing

7.  Pull evaporator unit out with blower attached.

This part of the system is installed by the coach builder so yours may not be identical but I imagine most would be similar.

Oh, if you are wondering if the new expansion valve fixed the problem I will tell you that I have a very good used one in inventory now.  ;)



  • IMG_7156.JPG
    126.1 KB · Views: 8
  • IMG_7158.JPG
    137.5 KB · Views: 7
  • IMG_7159.JPG
    97.9 KB · Views: 8
  • IMG_7160.JPG
    136 KB · Views: 8
Top Bottom