Aircon stopped working, and concerns about electric cooling fan!

Three_thirty_I · Today, 01:08 PM

So this past Friday I was driving and decided to turn the aircon on, immediately realised that things weren't working as normal, no change in air temperature, and didn't feel the effect of the aircon compressor on the engine. When I got home I started paying attention to what was relevant. The compressor wasn't engaging, and the electric cooling fan wasn't switching on. But then I was also concerned by the fact that with the engine getting warmer from idling in my garage, the electric cooling fan wasn't coming on to cool the engine.

A bit later I checked all relevant fuses for the aircon and all were fine. I then went for a drive with the hidden cluster menu on coolant temperature to see what is happening there, everything seemed to behave as normal with the temps climbing and dipping as I am used to. But once again, when idling in the garage, and the coolant temp finally sitting on 102 degrees Celsius, I was concerned that the electric cooling fan was not coming on at all, so I switched the engine off, worrying that it had failed somehow. I then got my laptop going and was able to test activate the electric cooling fan via INPA, so the fan DOES work, let it run the three different speed profiles, 15%, 50% and 90%.

So I am going to get the car to an aircon specialist this week, my suspicion is that it has simply run out of gas, possibly has a slow leak. When I bought the car at the beginning of the year, the previous owner did mention that he felt that the aircon wasn't making as cold on the one side as the other, typically an indication that the gas is low. But why on earth would the electric cooling fan be so reluctant to come on, or come on at all?

StradaRedlands · Today, 01:29 PM

Shot in the dark, but check your battery as well. Our AC quit working when the battery was going bad. I believe it threw a code though, something about device cutoff due to voltage. Not sure on that , just my recollection.

As for the fan, maybe it just wasn't needed. If you're running 102C, isn't that the target operating temp?

Today, 01:08 PM	#1
Three_thirty_I Lieutenant Colonel 374 Rep 1,926 Posts Drives: 2010 BMW E90 330i M Sport Join Date: Aug 2010 Location: Cape Town, South Africa iTrader: (0) Garage List 2010 BMW E90 330i M ... [9.63]	Aircon stopped working, and concerns about electric cooling fan! So this past Friday I was driving and decided to turn the aircon on, immediately realised that things weren't working as normal, no change in air temperature, and didn't feel the effect of the aircon compressor on the engine. When I got home I started paying attention to what was relevant. The compressor wasn't engaging, and the electric cooling fan wasn't switching on. But then I was also concerned by the fact that with the engine getting warmer from idling in my garage, the electric cooling fan wasn't coming on to cool the engine. A bit later I checked all relevant fuses for the aircon and all were fine. I then went for a drive with the hidden cluster menu on coolant temperature to see what is happening there, everything seemed to behave as normal with the temps climbing and dipping as I am used to. But once again, when idling in the garage, and the coolant temp finally sitting on 102 degrees Celsius, I was concerned that the electric cooling fan was not coming on at all, so I switched the engine off, worrying that it had failed somehow. I then got my laptop going and was able to test activate the electric cooling fan via INPA, so the fan DOES work, let it run the three different speed profiles, 15%, 50% and 90%. So I am going to get the car to an aircon specialist this week, my suspicion is that it has simply run out of gas, possibly has a slow leak. When I bought the car at the beginning of the year, the previous owner did mention that he felt that the aircon wasn't making as cold on the one side as the other, typically an indication that the gas is low. But why on earth would the electric cooling fan be so reluctant to come on, or come on at all? __________________ 2010 BMW E90 330i M Sport (M) Ex: BMW E90 330i (M) '05 (His) \| (Hers) BMW E46 320i f/l (M) '03
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Today, 01:29 PM	#2
StradaRedlands Brigadier General 6388 Rep 3,827 Posts Drives: 2006 BMW 330i MT Join Date: Dec 2021 Location: SoCal iTrader: (2) Garage List 2006 BMW 330i [8.45] 2009 BMW 328i Touri ... [8.00] 2013 BMW X5 35i [7.80] 2011 BMW 528i [8.70] 2006 Mazda3 [5.50]	Shot in the dark, but check your battery as well. Our AC quit working when the battery was going bad. I believe it threw a code though, something about device cutoff due to voltage. Not sure on that , just my recollection. As for the fan, maybe it just wasn't needed. If you're running 102C, isn't that the target operating temp?
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