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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 09-28-2011, 09:02 AM
dwifenderbender dwifenderbender is offline
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Location: arkansas, usa
 
Join Date: Sep 2011
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Mein Auto: 2001 z3
2001 Z3 Heater not blowing hot air

Hello, i just bought my wife a 2001 Z3 with the 3.0 and the other day i turned the heater on for the first time and it blows nothing but cold air. Dial is turned all the way to hot, a/c button is off.
I dont see any coolent leaks, the coolent level is above the min and below the maximum, a test of the coolent shows the mixture is correct. I have bled the coolent system using the bleeder that sits to the right of the overflow cap. When that didnt fix it, i raised the front of the car up nearly 3 feet and bled it some more, still no heat.
I found what i belive to be the heater core lines, one goes directly thru the firewall, the other connects to an electronic device then thru the firewall, both hoses are warm/hot to the touch.
Once the motor warms up, the temp gage stays at about halfway but still no heat. I would appreciate any further instructions to prevent an expensive trip to the dealer.
Thanks
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  #2  
Old 09-28-2011, 09:28 AM
SUNZOUT SUNZOUT is offline
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Mein Auto: '00 M Roadster
Is this just at Idle? do you get heat when driving?
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  #3  
Old 09-28-2011, 09:30 AM
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elfhearse elfhearse is offline
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Location: PA
 
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Mein Auto: 00Z3MC,10328iT,14X1x28
It could be the Bowden cable not working under the dash (open/close air flap)
or : http://www.bimmerfest.com/forums/sho...t=heater+cable
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  #4  
Old 09-28-2011, 10:05 AM
Monolith Monolith is offline
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Mein Auto: 1997 Z3 1.9L DASC Auto
You also need to keep the RPMs above 2000rpms for the heater valve to open while bleeding the cooling system. Otherwise, you won't be bleeding the heater core. Need to have the heat selector all the way on full heat as well.
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  #5  
Old 09-28-2011, 10:41 AM
dwifenderbender dwifenderbender is offline
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Location: arkansas, usa
 
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Mein Auto: 2001 z3
Thanks guys, thats what it was, i took the glove box out as well as the metal plate and found that the clip at the end of the cable that attatches to the lever to change from hot to cold had come loose, snapped the clip back into place now got heat and a/c

thanks for the quick response!!!
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  #6  
Old 04-24-2013, 10:24 PM
cholfinger cholfinger is offline
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Location: jax fl
 
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Mein Auto: 2000 bmw z3
Can you explain in more detail what you did to resolve your issue?
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  #7  
Old 04-25-2013, 05:01 AM
crappyattitude1 crappyattitude1 is offline
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Location: Crappyville, TN
 
Join Date: Nov 2011
Posts: 159
Mein Auto: '99 ////M Roadster
This thread is almost......

two years old.... But it sounds as if his Bowden cable had come loose. (Thats the cable that controls the air mixture flap). And as he said... He took the glovebox out and put the c-clip back on.

If you are having the same problem... I would suggest going to the "link" that was in someones else's comments above. Or try the other suggestions, such as bleeding the coolant system.

Good Luck!

Crappy : )

(Just outside of Nashville)
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  #8  
Old 04-25-2013, 06:25 PM
sinbad4 sinbad4 is offline
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Location: MN
 
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Mein Auto: Z4M
In my experience; if your blower is working; this is symptomatic of bad engine thermostat. thermostats fail open.. and do now allow coolant to heat up. Not sure where it is on Z4.. but some most cars is easy replacement and usually ~$12 (prolly 36 on bimmer then. ;-) )
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