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-   -   X5 AC strange behavior (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/88568-x5-ac-strange-behavior.html)

SlickGT1 08-15-2012 09:32 AM

Quote:

Originally Posted by TiAgX5 (Post 891425)
Yeah, that was me that posted the direct correlation between low pressure side reading and fan speed. I think I said date raped ape. At 50psi on a 100 deg F day the fan sounded like a turboprop cleared for takeoff!

Right. I think Turbo was the other person, and he asked me to check with my fan operation. My fan wouldn't spin untill it needed to. Then spun like the same ape when I started the car in 100F, parked in the sun. I was surprised.

I am also pretty sure there is a pressure switch that must be responsible for the fan operation as well as a temp switch, and possibly other stuff. Out of all the BMWs that I have had, or family has had, I have never had a failed fan. It was always the refrigerant. I had quite a few blower motor fails though. So not looking forward to that if it happens in the X.

X5Cat 08-19-2012 01:40 AM

Just an update on my FSR replacement. It's been a week now, and the blower is acting normal -- no running on forever after the ignition is switched off, and no dead battery. I guess I'm pronouncing it cured. FSR was apparently the culprit. Wife is happy. Thanks to others for their posts which led me to the FSR.

The potting compound in my old FSR seems kinda hard, so I might not be ripping into it anytime soon, like I mentioned a few days ago.

Now, I do have a bit of a cooling efficiency/refrigerant pressure issue, which I may be posting on soon. I went to a reputable A/C shop 2 or 3 weeks ago, and they topped off the 134a without evacuating. I'm only getting about 64F out of the vents on max. I think that was at an ambient of about 86F. Seems like it should be more. I may revisit the shop to discuss evacuating and carefully refilling with the correct amount of 134a. Will report later if I do.

E53inLA 08-19-2012 11:49 AM

2005 X5 3.0 64,000 miles

Seems like the AC used to take only a minute or so and then it would blow really cold air. Lately it takes 5-10 minutes and blows cold, but not the same chilly cold as before.

Took it to shop yesterday and they told me they checked for leaks and didn't find any, but the system need to be emptied & recharged. I can't tell any difference after the work is done. Any suggestions?

TiAgX5 08-20-2012 02:43 PM

Quote:

Originally Posted by SlickGT1 (Post 891432)
.....I had quite a few blower motor fails though. So not looking forward to that if it happens in the X.

The blower fan had a mind of its own when I went to inspect my X at the Acura dealer in Sanford FL that was selling it. Told them it was a huge $3k job to fix this problem (KNEW it was the FSR). They were asking over $19k +tax, tag and title for the truck, used the fan problem and history of 5HP24 trans failures at slightly over 100k mile (I told them $7K for that job) to get it for under $13k +t,t &t! It's good to know the common problems and costs while working the deal, dropped them over $6k.

Fan would make a repetitive chirp sound while spinning down to a stop at shutdown last winter, been fine since. Is that a sign that the fan motor is on it's way out?

SlickGT1 08-20-2012 02:56 PM

Quote:

Originally Posted by TiAgX5 (Post 892299)
The blower fan had a mind of its own when I went to inspect my X at the Acura dealer in Sanford FL that was selling it. Told them it was a huge $3k job to fix this problem (KNEW it was the FSR). They were asking over $19k +tax, tag and title for the truck, used the fan problem and history of 5HP24 trans failures at slightly over 100k mile (I told them $7K for that job) to get it for under $13k +t,t &t! It's good to know the common problems and costs while working the deal, dropped them over $6k.

Fan would make a repetitive chirp sound while spinning down to a stop at shutdown last winter, been fine since. Is that a sign that the fan motor is on it's way out?

That chirp is probably the sampler fan. The one that is in the climate control. The vents by the display. There is a sampler fan in there, and mine does the chirp once in a while too. There was a guy on here that did a DIY about cleaning it. Looked simple enough. He actually replaced the fan after he discovered it had a little chip in it.

X5Cat 08-25-2012 10:20 PM

I put the ShopVac to my sampler fan vents this afternoon. Used the reducer fitting with the small end opening, for high suction. Really pulled a lot of junk out of there.

BTW, FSR replacement still seems to be a success....

J-FEEZY 08-26-2012 02:14 AM

Quote:

Originally Posted by X5Cat (Post 892070)
Just an update on my FSR replacement. It's been a week now, and the blower is acting normal -- no running on forever after the ignition is switched off, and no dead battery. I guess I'm pronouncing it cured. FSR was apparently the culprit. Wife is happy. Thanks to others for their posts which led me to the FSR.

The potting compound in my old FSR seems kinda hard, so I might not be ripping into it anytime soon, like I mentioned a few days ago.

Now, I do have a bit of a cooling efficiency/refrigerant pressure issue, which I may be posting on soon. I went to a reputable A/C shop 2 or 3 weeks ago, and they topped off the 134a without evacuating. I'm only getting about 64F out of the vents on max. I think that was at an ambient of about 86F. Seems like it should be more. I may revisit the shop to discuss evacuating and carefully refilling with the correct amount of 134a. Will report later if I do.

64 degrees would be a perfect temp if it was 85 degrees INSIDE your vehicle.... just sayin. Kudos to you for fixing the fan problem first.:popcorn:


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