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#1
06-27-2009, 04:05 PM
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New FSU now blows hot air,help!
Last edited by Rafael Gonzalez; 06-28-2009 at 07:41 PM. Reason: Moore of the same problem 
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#2
06-27-2009, 07:11 PM
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The final stage unit only controls the fan speed output, so wouldn't cause the problems you are experiencing. Sounds like you have a blown fuse for the AC system control panel... Look at the AC fuses in the glovebox and you should find the blown one.
__________________
"When you do things right, people won't be sure you've done anything at all" (Bender, futurama) You make something idiotproof, they'll make a better idiot You think professional is expensive, just wait until you pay for amateur. Never let your sense of morals prevent you from doing what is right. Examine what is said, not who speaks. X5 pics RIP 4.6is..... 2003 4.6is 
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#3
06-27-2009, 08:37 PM
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I just checked all fuses and they are ok.I'm stuck now don't know what else to do.If you have any suggestions let me know,thanks,Rafael.When you mean AC system control panel,what do you mean exactly.I looked at the fuse box and check ac fuse and everything else that has to do with the system,they were all good.
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#4
06-27-2009, 10:00 PM
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There is a heater diverter valve, you can see pics of them on Auto Parts at AutohausAZ - OEM Auto Parts - Discount Replacement Parts, Resources and Car Care Tips or Google 'BMW heater valve'. Its near/on the drivers side shocktower. These commonly fail due to lack or regular coolant flushes.
__________________
 650hp 10 X5///M - Stage 2, Vibrant 1794's , gutted cats, custom intake, AC Forged 22's 325hp 98 BMW 740iL - ///M5 6spd, www.bavengine.com w/ Performance Option, electric fan, CF intake tube w/ heatshield, Mag 14816 w/ notched bumper, Bilstein/H&R Stage II/Powerflex 600+hp 02 Harley F150 - MHP900 Stage 3 engine, KB2.3, 8# lower, 60# inj, Walbro FP's 135hp 01 TL1000R - M4 full exhaust, K&N, Yosh box, -1/+2 gears, 2CT's
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#6
06-28-2009, 05:42 PM
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If all the fuses are good, the ac control, known in BMW terms as the IHKA, likely failed... And without it to translate all the input/output signals the ac will not work right.
__________________
"When you do things right, people won't be sure you've done anything at all" (Bender, futurama) You make something idiotproof, they'll make a better idiot You think professional is expensive, just wait until you pay for amateur. Never let your sense of morals prevent you from doing what is right. Examine what is said, not who speaks. X5 pics RIP 4.6is..... 2003 4.6is
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#7
06-29-2010, 02:13 AM
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Getting the panel off and finding the FSu literally took me 5 minutes..but I've been battling for 30 minutes trying to get the plug off. My fingers hurt from so much squeezing the clips on the harnes.. Wanted to use pliers but i'm afraid i may break the clips on the harness. Any ideas?
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#8
06-29-2010, 07:43 AM
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Squeezing the clips isn't the hard part, it's pulling the plug loose once the clips are squeezed. The pins in the plug can have a pretty good hold of eachother. I sometimes remove the FSR from te housing with it still plugged in just so I can get my hand around it to pull.
__________________
"When you do things right, people won't be sure you've done anything at all" (Bender, futurama) You make something idiotproof, they'll make a better idiot You think professional is expensive, just wait until you pay for amateur. Never let your sense of morals prevent you from doing what is right. Examine what is said, not who speaks. X5 pics RIP 4.6is..... 2003 4.6is
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#9
06-29-2010, 01:07 PM
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^^^Hey weasel, what happen if it was the other way around? I'm getting cold A/C, but no heat.
__________________
03 E53 X5 4.6is Sapphire Black on Black 08 e65 750i Alpine white, Sport Package
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#10
06-29-2010, 01:15 PM
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The FSR has nothing to do with the temperature of the air, just controls the fan speed. If it blows cold but not hot it is more than likely the heater control valves. If you want to confirm that diagnosis yourself pick up one of those infrared thermometers with laser pointer you can see what hoses get hot and where the heat stops in route to the heater core. But as I said, likely the heater valves.
__________________
"When you do things right, people won't be sure you've done anything at all" (Bender, futurama) You make something idiotproof, they'll make a better idiot You think professional is expensive, just wait until you pay for amateur. Never let your sense of morals prevent you from doing what is right. Examine what is said, not who speaks. X5 pics RIP 4.6is..... 2003 4.6is
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