05 Elise AC Problem. Need Help - LotusTalk - The Lotus Cars Community
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post #1 of 28 (permalink) Old 06-30-2010, 12:35 PM Thread Starter
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05 Elise AC Problem. Need Help

I have an 05 Elise. The AC works fine for about 45 min. then starts blowing hot air. If I turn the car off for a couple hours and start it up again the AC works just fine for another 45 min before it stops working again. Has anyone had this problem??? I Live in Southern Louisiana and am no where near a Lotus Dealer. Any help would be greatly Appreciated..

Thanks Noah
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post #2 of 28 (permalink) Old 06-30-2010, 12:40 PM
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it's probably freezing over. I have the same problem with mine.
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post #3 of 28 (permalink) Old 06-30-2010, 01:16 PM
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Noah,

It does sound like your probe is freezing over. You can either:

1. reposition the probe (instructions here: https://www.lotustalk.com/forums/f313...g-probe-81862/)

or

2. upgrade to the "newer" probe (for about, last I checked, $150 or so):

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post #4 of 28 (permalink) Old 07-01-2010, 07:32 AM Thread Starter
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Thanks very much for the help
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post #5 of 28 (permalink) Old 07-11-2010, 10:29 AM
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I'm having the same symptoms on my '06 Elise - AC starts off blowing cold and after 20-30 minutes of highway driving the air is warm and hardly blowing. Leave it off for a while and its working again. This is a great write-up...I'm going to check for the coil probe position..
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post #6 of 28 (permalink) Old 07-12-2010, 11:24 AM
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a/c update

anyone have pics of how to do this? I have the same issue. thanks!!
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post #7 of 28 (permalink) Old 07-13-2010, 11:42 AM
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Me too. If anyone has pics.
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post #8 of 28 (permalink) Old 07-13-2010, 11:58 AM
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Repositioning the evaporator capillary temperature sensor rarely gives satisfactory results. The real solution to to replace the sensor with the electronic version. I did this a few years ago and never had that problem again.
See here Improved AC
Michael
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post #9 of 28 (permalink) Old 07-18-2010, 05:51 PM
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Quote:
Originally Posted by TheViper View Post
Repositioning the evaporator capillary temperature sensor rarely gives satisfactory results. The real solution to to replace the sensor with the electronic version. I did this a few years ago and never had that problem again.
See here Improved AC
Michael
Since checking the position costs $0.00 and takes 15 minutes I took a look. Unfortunately, the probe seems to be already positioned as prescribed - 2nd row middle, touching the evaporator fin. Looks like I'll be replacing it soon..
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post #10 of 28 (permalink) Old 07-18-2010, 06:00 PM
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My AC just blows hot air. I tried the probe change, but got no results... I think the unit needs to be swapped... how much should I expect to pay to have it changed out?
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post #11 of 28 (permalink) Old 07-18-2010, 06:47 PM
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If it's actually blowing heated air then the probability is that the flap valves within the HVAC enclosure are not operating correctly.
If it's blowing ambient air then I would first check the refrigerant charge.
Michael
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My AC just blows hot air. I tried the probe change, but got no results... I think the unit needs to be swapped... how much should I expect to pay to have it changed out?
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post #12 of 28 (permalink) Old 07-18-2010, 07:00 PM
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Mine freezes over as well. I had forgotten about the retrofit unit.

Is this a diy job, or something a Lotus dealer should be doing? I change my own oil often and have done a few other things on the car. The directions look fairly straightforward.

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post #13 of 28 (permalink) Old 07-18-2010, 07:01 PM
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DIY
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post #14 of 28 (permalink) Old 07-18-2010, 07:05 PM
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Can be done by the DIY, however when my tech was installing mine he had to get some instruction clarification from Lotus.
Michael
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Originally Posted by MikeinAlexandria View Post
Mine freezes over as well. I had forgotten about the retrofit unit.

Is this a diy job, or something a Lotus dealer should be doing? I change my own oil often and have done a few other things on the car. The directions look fairly straightforward.
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post #15 of 28 (permalink) Old 07-19-2010, 08:30 AM
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Fyi, I just contacted Lotus Garage. They are now charging $124 plus shipping for the update. Not hateful!

2013 Porsche Boxster (in silver and red, home at last!)
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2005 Elise in Racing Green with the touring pack (sold 8/6/12)
2007 MINI Cooper S in Sparkling Silver (sold)
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Last edited by SirLotus; 07-19-2010 at 08:43 AM.
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post #16 of 28 (permalink) Old 07-19-2010, 08:44 AM
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Less expensive than I was quoted
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Fyi, I just contacted Lotus Garage. They are now charging $124 plus shipping for the update. Not hateful!
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post #17 of 28 (permalink) Old 08-11-2010, 12:53 PM
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Does anyone know when Lotus started actually putting these retrofits into the Elises? I have an 05 Elise and just took it into the dealer to get the retrofit done since I have the same issue with the A/C not working after about 20 - 30 minutes and I'm tired of dealing with the heat. The dealer called and indicated that I have the updated thermostat (part number A120P0149S) in my car. I'm wonder how that is since the retrofit document indicates that this part is assocated with Feb 07 builds.

With a car like this I could, dare I say it, Rule The World
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post #18 of 28 (permalink) Old 08-11-2010, 12:57 PM
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Quote:
Originally Posted by Dennis View Post
Does anyone know when Lotus started actually putting these retrofits into the Elises? I have an 05 Elise and just took it into the dealer to get the retrofit done since I have the same issue with the A/C not working after about 20 - 30 minutes and I'm tired of dealing with the heat. The dealer called and indicated that I have the updated thermostat (part number A120P0149S) in my car. I'm wonder how that is since the retrofit document indicates that this part is assocated with Feb 07 builds.
My '07 launch Elise (Jun '06 build) had the old thermostat.
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post #19 of 28 (permalink) Old 08-11-2010, 01:01 PM
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They were installed as of Feb.'07. Pull the main center duct and confirm. If it is present, it was retrofitted and would be noted on the service history.
Cheers,
Michael
Quote:
Originally Posted by Dennis View Post
Does anyone know when Lotus started actually putting these retrofits into the Elises? I have an 05 Elise and just took it into the dealer to get the retrofit done since I have the same issue with the A/C not working after about 20 - 30 minutes and I'm tired of dealing with the heat. The dealer called and indicated that I have the updated thermostat (part number A120P0149S) in my car. I'm wonder how that is since the retrofit document indicates that this part is assocated with Feb 07 builds.
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post #20 of 28 (permalink) Old 08-11-2010, 01:22 PM
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Does anyone know if there is a visual difference between the old version and the new version? The dealer is telling me that my current thermostat is identical to the part A120P0149S including the part number. I bought the car new in Sept of 05, and I know that the thermostat has never been changed out.

With a car like this I could, dare I say it, Rule The World

Last edited by SirLotus; 08-11-2010 at 01:50 PM.
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