Fault with heater air con 523 i

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   Can anybody help? 
I have a 523i recently I have been getting strange noises from what seems to be coming from under the dash when I have run the car for ten fifteen minuets or so.
The sound is like a bubbling noise then a squealing noise as if liquid is being forced though a half closed valve. Then the fan inside the car will change speed without touching any controls and start blowing erratically but both the heating and air con do blow hot and cold still. Any ideas suggestions on this problem?
this is driving me mad

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denboy Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 22-May-2006 Status: Offline Points: 1	Topic: Fault with heater air con 523 i Posted: 24-May-2006 at 18:15
	Can anybody help? I have a 523i recently I have been getting strange noises from what seems to be coming from under the dash when I have run the car for ten fifteen minuets or so. The sound is like a bubbling noise then a squealing noise as if liquid is being forced though a half closed valve. Then the fan inside the car will change speed without touching any controls and start blowing erratically but both the heating and air con do blow hot and cold still. Any ideas suggestions on this problem? this is driving me mad

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Andrew Rolland Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Go away rain Joined: 19-August-2004 Location: Scotland Status: Offline Points: 6579	Posted: 25-May-2006 at 03:02
	Welcome to the forum. I had this, sounds like water sloshing and gurgling about under the dash. It was air entering the cooling system via a leak on the stat housing. New stat, stat housing, water pump, coolant drain, flush then refill and most importantly of all - bleed the cooling system to prevent air locks cured the noise. Or it could be the refrigerant as you say trying to flow around the air con pipes. You can go to or get a mobile air con specialist out to your car to check it out for you. Have you just started using the air con after the winter? Could just be lack of lubricant thru the system caused by long periods of no use over the winter which is preventing the valves from opening and closing properly. Again an air con specialist can add oil into the refrigerant. HTH Andrew
	Be exclusive and drive a Petrol 5 Series! Current '13 62 F10 535i MSport Auto Previous '04 04 E60 545i SE Auto '03 53 E60 545i SE Auto (Stolen) '98 S E39 523i SE Auto