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Discussion Starter · #1 ·
Hey guys,<p>I am having an issue that I am hoping you all can assist me with.<p>Here is the issue.<p>My A/C will not blow cold and my radiator fan (I believe) is running at full speed right when I turn the car on. Now if I pull the fuses and reset my ECU the fan runs fine again untill I try and turn on my A/C. Once I turn on the A/C the fan ramps up again.<p>During all of this, I am not getting any cold air out of my A/C. When I took my car in a while ago, the shop mentioned some sensor was throwing a code. He said the sensor was in front behind the bumper.<p>Any ideas here guys? Will replacing this "sensor" fix both my fan and A/C issues.<p>I want to try and find out what the part number is and if I can do the work myself.<p>Thanks in advance. <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0"> <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/embeer.gif" BORDER="0"> <BR><BR>
<i>Modified by CSlater21 at 8:18 PM 6-1-2009</i>
 

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Re: Strange things A-foot.... Assistance Required (CSlater21)

I remember something on the '04s that sounded similar to what you're describing (at least with the fan) that involved some sensor, yes. Unfortunately, I don't remember the particulars... <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/frown.gif" BORDER="0"> What is your engine temp gauge displaying when this happens? <p>-Steve
 

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Re: Strange things A-foot.... Assistance Required (CSlater21)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>CSlater21</b> »</i></TD></TR><TR><TD CLASS="quote">Hey guys,<p>Any ideas here guys? Will replacing this "sensor" fix both my fan and A/C issues.<p>I want to try and find out what the part number is and if I can do the work myself.<p>Thanks in advance. <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0"> <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/embeer.gif" BORDER="0"> </TD></TR></TABLE><p>Suggest calling John Sharisky @ BVV to see if he can look it up for you. Otherwise, take it back and get more information on the code and source.
 

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Re: Strange things A-foot.... Assistance Required (CSlater21)

I'm thinking the Boost Pressure Sensor with the incorporated IAT sensor. If it's going bad, it will tell your ECU that temperatures are ALL out of whack, causing the fans to run, the AC to not blow cold, etc...<p>This is an inexpensive sensor, I believe under $100 online. It is located behind the front bumper. I want to say it's on the inlet to the intercooler. Search it up (BPS and IAT sensor), see if you get hits describing the same scenario. I hope this will be an easy fix for ya <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0">
 

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Re: Strange things A-foot.... Assistance Required (JoeLvo)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>JoeLvo</b> »</i></TD></TR><TR><TD CLASS="quote">I'm thinking the Boost Pressure Sensor with the incorporated IAT sensor. If it's going bad, it will tell your ECU that temperatures are ALL out of whack, causing the fans to run, the AC to not blow cold, etc...<p>This is an inexpensive sensor, I believe under $100 online. It is located behind the front bumper. I want to say it's on the inlet to the intercooler. Search it up (BPS and IAT sensor), see if you get hits describing the same scenario. I hope this will be an easy fix for ya <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0"></TD></TR></TABLE><p>+1<p>The boost/IAT sensor is located on the inlet to the intercooler and is visible from above if you pop the hood open and look down.
 

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Re: Strange things A-foot.... Assistance Required (JoeLvo)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>JoeLvo</b> »</i></TD></TR><TR><TD CLASS="quote">I'm thinking the Boost Pressure Sensor with the incorporated IAT sensor. If it's going bad, it will tell your ECU that temperatures are ALL out of whack, causing the fans to run, the AC to not blow cold, etc...<p>This is an inexpensive sensor, I believe under $100 online. It is located behind the front bumper. I want to say it's on the inlet to the intercooler. Search it up (BPS and IAT sensor), see if you get hits describing the same scenario. I hope this will be an easy fix for ya <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0"></TD></TR></TABLE><p>+2<p><br>Missed you at the last GTG. I really wanted to see your interior in person. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/frown.gif" BORDER="0">
 

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Re: Strange things A-foot.... Assistance Required (mad matt)

Who's got 3 points? I got 3 points!! <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/biggrin.gif" BORDER="0"><p>Yessssss. Now, I just hope it fixes the trubs...
 

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Discussion Starter · #10 ·
Re: Strange things A-foot.... Assistance Required (mad matt)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>mad matt</b> »</i></TD></TR><TR><TD CLASS="quote"><p>+2<p><br>Missed you at the last GTG. I really wanted to see your interior in person. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/frown.gif" BORDER="0"> </TD></TR></TABLE><p>Yeah.. I really wanted to be there.. I work real close to the brewery, but had to stay late as one of my employees went home sick. I am gonna make the next one though. <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0"> <p><br>Thanks for all the help guys. I will place an order for the part.<p>Now anything special to taking off the bumper cover to get to it?
 

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Re: Strange things A-foot.... Assistance Required (CSlater21)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>CSlater21</b> »</i></TD></TR><TR><TD CLASS="quote"><p>Yeah.. I really wanted to be there.. I work real close to the brewery, but had to stay late as one of my employees went home sick. I am gonna make the next one though. <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0"> <p><br>Thanks for all the help guys. I will place an order for the part.<p>Now anything special to taking off the bumper cover to get to it?</TD></TR></TABLE><p>I haven't taken off the bumper on my R as of yet but it shouldn't bee all that hard. <p><br>The next GTG, is July 12th with the S40 boys and girl. <A HREF="http://forums.swedespeed.com/zerothread?id=117483" TARGET="_blank">http://forums.swedespeed.com/zerothread?id=117483</A>
 

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So, engine off, key on = no fan. Start car = fan on full.<p>Don't buy that part. You do not need it.<p>My car does the exact same thing. Every time I clear the a/c code the fan will resume normal operation till iIpress either a/c on or auto on the climate control.<p>If your a/c is discharged it will throw a code in the ecm saying "a/c pressure low" and will turn your fans on all the time. Don't ask my why Volvo decided fans need to be on constantly when that code is stored....<p>That code does not trigger a CEL either.<p>Spend the $$ on getting your a/c fixed.<p>Since you're relatively local if you ever need I can read and erase codes off almost all modules on your car.<p>
 

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And yes pulling the bumper cover off is pretty dang easy IMO. Just make sure you have 2 people.<p>The screw that is in the wheelwell only needs to be unscrewed about 1" or so, then push the screw in. You'll understand why once you have the bumper cover off......
 

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Discussion Starter · #14 ·
Re: (firehawk618)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>firehawk618</b> »</i></TD></TR><TR><TD CLASS="quote">Don't buy that part. If your a/c is discharged it will throw a code in the ecm saying "a/c pressure low" and will turn your fans on all the time. Don't ask my why Volvo decided fans need to be on constantly when that code is stored....<br>My car does teh exact same thing. Every time I clear the a/c code the fan will resume normal operation till i press either a/c on or auto on teh climate control. Spend the $$ on getting your a/c fixed. <br>If you want I can pull codes off almost all your modules in your car.</TD></TR></TABLE><p>Tell me more my friend <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0"> <p>What you explained is exactly what happens to mine.. Press A/C or Auto and bam.... on comes the fan.<p>So I just need to charge my A/C? What does that run?
 

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Sorry, edited my post when you were posting....<p>I just took mine in for a/c recharge here locally. $140 out the door. Full evac, replace oil and recharge.<p>Mine had gotten discharged when I was repairing the car.<p>Your freon / 134a leaked out somewhere if in fact you are throwing that code...or the pressure sensor is bad. Highly unlikely the sensor is bad.<p>I'd spend the extra $$ and find out where it leaked out. Probably bad o-ring somewhere.
 

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I would like a ride in your car too if you ever do make it up here for diagnostics. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0">
 

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Discussion Starter · #18 ·
No Problem. It has almost 80K on the clock now... I am slowing but surely fixing all the "little things" on it to get it back up to snuff...
 

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Re: (firehawk618)

Seattle area GTG would be a great place to meet up with each other...... July 12 in Lynnwood. See my post above for info. <p>Sorry, I'm just really trying to promote this thing. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/wink.gif" BORDER="0">
 
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