Guest weewilly Posted October 30, 2007 Share Posted October 30, 2007 When switching to "auto" on the ac/ heater controls the unit will not go to true "auto" only goes to "econo". Then does not blow real cold. All was working well until trying heater button then switching back to auto. Temp is set at 60 degrees and now goes to econo when swithching to auto. Am I doing something wrong or has my control module gone bad. Please help. 1990 reatta witch just turned to 100,000 miles had a new a/c unit control modul done at 98000 miles (did not know till today wife paid to have it replaced because fan was stuck on and ran down battery when I was out of town 2 months ago.(She never told me till today) Link to comment Share on other sites More sharing options...
Guest weewilly Posted October 31, 2007 Share Posted October 31, 2007 please help? any ideas? Link to comment Share on other sites More sharing options...
Barney Eaton Posted October 31, 2007 Share Posted October 31, 2007 If the control is in "econo" and you push the "auto" button, does the "auto" button light? If it DOES NOT it is probably the control unit ...buttons not making contact.The fan stuck on ON was not the interior control, that problem is the fan control unit in the engine compartment.So the interior control probably HAS NOT been changed. Link to comment Share on other sites More sharing options...
Guest weewilly Posted January 2, 2008 Share Posted January 2, 2008 yes the auto light goes on but econ light does not go out.Is it possible that it is to cold (colder that 60 degrees) and the air just wont go on?this started happening again. Link to comment Share on other sites More sharing options...
Guest sanders Posted January 3, 2008 Share Posted January 3, 2008 Does anyone know where to obtain a new dash A/C, fan and heat control unit for a 1990 Reatta .Any idea of cost ? My fan seems to be stuck on low and won't change to a higher speed .The temperature is set for 75 degrees and won't go higher or lower .The lights on the dash control work and It will change from A/C to heat and defrost and throw heat at low speed also .Also where is the fan control unit in the engine compartment and how would I go about testing it to see if the problem lies there ? Link to comment Share on other sites More sharing options...
jonlabree Posted January 3, 2008 Share Posted January 3, 2008 The control in the dash needs to be cleaned. Link to comment Share on other sites More sharing options...
Guest sanders Posted January 3, 2008 Share Posted January 3, 2008 63 viking When you say the control in the dash needs to be cleaned do you mean remove and blow clean with compressed air or washed with some kind of solution ? I am not very mechanical and need to pass this information on to my garage . My garage is like a lot of them , Don't fix it replace it !! Link to comment Share on other sites More sharing options...
jonlabree Posted January 3, 2008 Share Posted January 3, 2008 It needs to be taken out and taken apart and the contacts cleaned with a good contact cleaner. Wipe them really good.Put it back together and it will work like new.If this doesn't work then contact Jim Finn for a replacement. He has then cheap. Link to comment Share on other sites More sharing options...
Guest weewilly Posted January 14, 2008 Share Posted January 14, 2008 I was able to get my air working again by just disconecting the negative on my battery waiting 5 minutes then reconnecting. Then the air starting working just like new. Very wierd. I did this after reading the air conditioning recharge instructions on a label under hood. I quess the electronics in this car were ahead of there time. I hope it continues to work..... Link to comment Share on other sites More sharing options...
jonlabree Posted January 14, 2008 Share Posted January 14, 2008 Is it that warm out there that you need AC already? Link to comment Share on other sites More sharing options...
Ronnie Posted January 14, 2008 Share Posted January 14, 2008 In cold weather the AC should come on under certain conditions in defrost mode to dehumidify the air in order to clear the windshield faster. Link to comment Share on other sites More sharing options...
Guest weewilly Posted February 9, 2008 Share Posted February 9, 2008 My car is still having problems with the econ light going on when you try to get air. I put the control to auto and the econ light just flashes then stays on (no air) also the auto light goes on and stays, and the econ light is still on. but no air.Then when I disconnect battery ground and reinstall all works fine for a while (days, weeks).I am perplexed on what is wrong, Is it electrical? Is it the dash control? or is there something wrong with ac unit itself? Need Ideas pleas Link to comment Share on other sites More sharing options...
Barney Eaton Posted February 9, 2008 Share Posted February 9, 2008 Pull out the A/C control and clean it with contact cleaner, do a search, it has been explained several times. I think what happens when you disconnect the battery.... the control resets to AUTO and will stay there until you start pushing buttons, some of the buttons may have an intermittant contact and work but it sounds like the ECON button is working.I suspect that if you try to change the fan speed while it is in AUTO the fan will not change speed. Link to comment Share on other sites More sharing options...
Guest weewilly Posted February 9, 2008 Share Posted February 9, 2008 The fan speed does change when in auto , but will try cleaning contacts on a/c control. I allready have another controller so will clean that one and try it. Thanks, I hope it works, will let you know. Link to comment Share on other sites More sharing options...
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