Evening all,
As per the title, the air con, once the engine is to temperature will only blow hot air out, irrespective of what the temp contollers are on.
Any idea of the root cause or how to fix?
TIA
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Air con constantly blowing hot
- Overweight Unicorn
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Air con constantly blowing hot
E89 23i M Sport Highline
Alpine white
Red Coral
19" 326M
Alpine white
Red Coral
19" 326M
- Nictrix
- Lifer
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Air con constantly blowing hot
Is it from all vents or just the ones in the middle of the dash?
The ones in the middle of the dash have their own adjusting wheel for temperature that is separate from the main control.
The ones in the middle of the dash have their own adjusting wheel for temperature that is separate from the main control.
E89 2014 35i M Sport Black with Black leather
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Air con constantly blowing hot
For me the first action would be to check the gas in the aircon system most garages will check that for £60-80
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- Lifer
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Air con constantly blowing hot
There is an easy way to check yourself if the a/c is short of refrigerant as long as the compressor runs:deltasierra wrote: ↑Sat Apr 27, 2024 9:43 am For me the first action would be to check the gas in the aircon system most garages will check that for £60-80
Turn the a/c on. Look at the end of the compressor to make sure the clutch is engaged and spinning. After a few seconds feel the temperature of the larger of the two easily accessible a/c pipes (it is on the right side of the engine bay looking at it from the front). That should feel cold, really cold.
If the pipe feels only cool or warm the refrigerant is low. Chances are that the compressor will 'cycle' quite often aswell in this scenario and the electric fan won't run.
The above presumes there is enough refrigerant for the compressor to run. If it is completely empty the compressor won't run.
All good things come to those who wait. I'm really impatient which explains a lot.
F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!
F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!
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Air con constantly blowing hot
If it’s blowing hot air out of all vents then it’s usually the temp sensor or control ECU..if it’s out of one vent it’s the stepper motor..
As usual first port of call is to read the codes with a decent BMW specfic fault code reader..
As usual first port of call is to read the codes with a decent BMW specfic fault code reader..
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is
A very modified Atacama Yellow 35is
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Air con constantly blowing hot
Fairly recent purchase?
Make sure the wheel under the vents is set halfway so you can see blue&red. If all you see is red, you get warm air no matter what you have the temp dial set to.
Make sure the wheel under the vents is set halfway so you can see blue&red. If all you see is red, you get warm air no matter what you have the temp dial set to.
From Jan 2023 2016 e89 Z4 35is / mineral white / coral red interior / all the extras
SOLD 2010 e89 Z4 35is / space grey / coral red interior / all the extras
SOLD 2007 e85 Z4 3.0 si sport / midnight blue / champagne interior
SOLD 2010 e89 Z4 35is / space grey / coral red interior / all the extras
SOLD 2007 e85 Z4 3.0 si sport / midnight blue / champagne interior
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- Joined: Sun Jan 12, 2014 11:36 am
Air con constantly blowing hot
Fairly recent purchase?
Make sure the wheel under the vents is set halfway so you can see blue&red. If all you see is red, you get warm air no matter what you have the temp dial set to.
Make sure the wheel under the vents is set halfway so you can see blue&red. If all you see is red, you get warm air no matter what you have the temp dial set to.
From Jan 2023 2016 e89 Z4 35is / mineral white / coral red interior / all the extras
SOLD 2010 e89 Z4 35is / space grey / coral red interior / all the extras
SOLD 2007 e85 Z4 3.0 si sport / midnight blue / champagne interior
SOLD 2010 e89 Z4 35is / space grey / coral red interior / all the extras
SOLD 2007 e85 Z4 3.0 si sport / midnight blue / champagne interior
- Overweight Unicorn
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- Joined: Sun Sep 01, 2019 4:31 pm
Air con constantly blowing hot
Thanks all.
To answer some of the questions, I've had the car (2011 23i) for over four years, but a I live overseas so it gets very little use other than my daughter taking it around the block once a week.
It blows hot out of all vents.
A Mechanic believes that a valve/flat has wedged open, but would need to remove the dash to be sure. For me though, I'd only expect one side to be affected if this were the case.
To answer some of the questions, I've had the car (2011 23i) for over four years, but a I live overseas so it gets very little use other than my daughter taking it around the block once a week.
It blows hot out of all vents.
A Mechanic believes that a valve/flat has wedged open, but would need to remove the dash to be sure. For me though, I'd only expect one side to be affected if this were the case.
E89 23i M Sport Highline
Alpine white
Red Coral
19" 326M
Alpine white
Red Coral
19" 326M