Quote:
Originally Posted by Chunker
Having trouble with the a/c on this camper. Has two(2) a/c set up with dual control digital thermostat. When ring both units on hot days it keeps giving a E1 code. Can run the aft unit and it works fine.
Any suggestions?
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Check out this thread;
http://www.forestriverforums.com/for...lp-118240.html.
The problem is more than likely in the RJ11 connectors up in the AC units. They get corroded due to extreme moisture.
This is how I finally fixed mine for good;
If you know which zone is flashing & know which AC unit that is on the roof then your next step is to get up on the roof and take the cover off that AC unit (requires a "square bit drive" tip for your drill or screwdriver.
Next, on the front half of the AC unit you will see a sheet metal enclosure (wish I had pics for you) with wires running into it. Facing the front of the AC unit is the sheet metal cover with about 8 1/4" screws. Take these screws out and CAREFULLY bend the sheet metal back (note the thin seal around the edge of the box you just opened up, make sure it stays in place). You are now looking down into the "air return" portion of the AC system. There should be "a bunch" of wires in there (probably just hanging there).
If so, this is where the problem begins. You should find "flat telephone" type communication cables in there. Somewhere you should also see a "modular coupler" connecting 2 "phone wires" together. In my case, this connector was all corroded because the wires were hanging down into the air return cavity exposing them to moisture in the returning air thus, corroding the connectors.
Disconnect the "phone wire" connections and clean or replace them if necessary. You can do this with the AC unit ON (they are low voltage communication wires). If after you've cleaned/replaced the cable ends and coupler (all parts available at Lowes/Home Depot etc. including the crimping tool for the new ends if necessary) and plug everything back together and the AC unit starts, then you have found and solved the problem.
Now, to keep from having the problem reoccur, I bundled them ALL together up as high in the box as close to the cover you bent out of the way as possible and secured the whole bundle by drilling 2 small holes in the sheet metal box just large enough to get a zip tie through to hold the bundle up out of the way.
Hopefully, this will work for you. As I mentioned, 3 trips by a local RV tech with instructions from Dometic to check and clean the communication cable connectors and it kept reoccurring! Finally, I went up and fixed it once and for all (hopefully) when I found the bottom of the return damp (from condensation) & put 2+2 together and went DUH!!!