Dash AC

[GZMandalay]

I have a Freon leak in my Thor Mandalay dash AC. Compressor, drier and expansion valve have been replaced and still have a leak somewhere. Tech has added dye to system but can't find any visable evidence of leak and says leak may be in lines running through the frame. Has anyone had this problem or have any suggestions on where to look for the leak?

[BFlinn181]

The tech has used dye to try to find the leak, have they tried electronic leak detection? If the leak is in a hose running back to front, it will very hard to see enough of the hose runs to spot a UV dye leak. One method to determine which hose is leaking, disconnect and cap it so it can be pressure tested.

If you can determine which hose is leaking, replacement is also very difficult because of compartments, systems, and tanks mounted underneath. I'd suggest having a new hose fabricated and installed, using frame rails and zip ties to fasten the new hose in place.

All of these actions will require a new drier and evacuating and recharging the system. At least if all the steps are followed, it should only need be done once more.