348 air conditioning problems

After searching the archives I haven't seen anyone address the problem I'm having with my a/c. I was getting the E1 code on my a/c panel intermittently, seemed to come on when I went over a bump in the road. It would reset somtimes by itself, and the a/c works fine when the code is not displayed. I pulled the panel and didn't like the ease with which I could remove the electrical plug to it. I just tried the Stabilant 22a? and now I get a steady E1 code, and no a/c at all. Anyone know where I should look next. E1 is supposed to be the cabin temp sensor. Is that mounted behind the perforations on the lower driver dash?. I'd love some suggestions before I start tearing things apart. Thanks.

 

I think I posted in the wrong area, but thanks so much, you guys are fantastic, I'll try the battery trick first, but I'm leaning towards the corrosion, as the problem was intermittent until the Stabalant 22a treatment. I'll be home tomorrow and will post the results. Thanks again.

 

Well, no luck, I switched off the battery, removed the control panel and worked it over for corrosion[none found] dosed it with Stabalant, and still get the E1 error. Everything functions, but with a mind of it's own. A/C will cycle on then off, Heat will cycle on then off. Acts as though it isin't getting a signal from the cabin temp sensor. If no one has a better idea, I'm going after the sensor next, perhaps it's come undone or it's connection is corroded, I hope!!

 

I'm not sure why that would help, but I flushed the system just prior to this.

 

Problem solved! I started to remove the instrument cluster binnacle and found a bunch of grounds attached to a metal strip which was bolted to the forward bulkhead behind it and to the left. Wiggling the grounds, some of which looked like they went towards the cabin temp sensor made the A/C error code dissappear, and now the a/c and heat work fine!!!

I saw in another thread while I was researching my problem, someone's a/c not cooling very well and the problem being a broken flapper valve in the a/c heater box for the recirc air. Low and behold, mine was broken too. So I pull the top trunk liner to access the actuator motor, and as I am doing it I remove a fire extinguisher mount that the P.O. must have installed. It's positioned just above the tool kit. As I unscrew the second mounting screw, coolant starts peeing out the hole!!! WTFO!! Turns out they had accidently screwed the mount into one of the heater hoses!! If I hadn't had the original a/c problem I probably wouldn't have discovered the coolant hose problem until August in the middle of Death Valley !!! Ferrari's work in mysterious ways.

 

Thanks for the link, I already "temp" fixed it with a screw thru it's center and a little epoxy, but I'm thinking Mr. Hill and I are going to do some business, he's got some other items I want as well.