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Bmw 316i fan only works on slow not cooling ac condenser the ac builds pressure and blow out the free on when its not moving

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: bmw 316i overheating

Also check the radiator cap. If the spring in the radiator cap is worn, it is not pressurizing the cooling system properly and therefore it will cause the vehicle to overheat. This is often overlooked and is a cheap repair. Every additional pound above atmospheric pressure that the cooling system is under causes the boiling point of the coolant in the system to raise 3 degrees F if memory serves me correctly. So, if the cap is old it will boil at 212 instead of 230 (for example)-and cause the system to overheat--even though everything else in the system is new/operating perfectly. If this is not your problem you may want to check to see if the cooling system itself is, indeed, holding pressure. You can get a gadget that fits on your radiator from any auto parts store to pressurize the system--after you pressurize it...leave it alone for about 20 minutes and see if it maintains pressure. If it doesnt, you have a leak somewhere. Hooah.

Posted on Dec 20, 2008

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bmw_tech_38
  • 113 Answers

SOURCE: Radiator removal BMW 316i

hi, the two clamps that secure the radiator have a small slot on the top, if you insert a small screwdriver into the slot and use it as a pry bar you should be able to unclip the holding clamp and it then releases like a hinge.

Posted on Feb 24, 2009

michael_grey
  • 365 Answers

SOURCE: ac not working properly

Low on R134A or condenser has a restriction
The condenser is in front of the radiator.
The R134a systems are known for not blowing as cold during idle.

Posted on Jun 30, 2009

stanley141
  • 124 Answers

SOURCE: bmw 316i overheating

check if the water is circulating as you might have a blockage in the header tank. this can be checked by opening the radiator cap and check if the water is circulating on top.

Posted on Jul 28, 2009

  • 15 Answers

SOURCE: ac does not blow cold at idle... ac condenser fan

that seems to be the problem. If the fan does not turn on when the a/c is turned on it could be a fuse, relay, control box, or just a bad fan. Try connecting the fan directly to see if it works. Does this car have 2 fans? normally all the small cars have 2 fans one for the engine cooling and one to assist the first when the a/c is turned on. Without the fan pulling air through the a/c condensor the had pressure goes up high enough to shut off the a/c compressor. It also causes some cars to run warmer than usual when stopped. Check the a/c condensor for blockage also which doesn't have anything to do with your fan not working.

Posted on Aug 18, 2009

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On my 2006 ac works good when engine is cool, in stop & go traffic it blows hot air & head pressure gets high in ac, car temp is ok what's wrong


How do you know head pressure is high? Do you have an auxiliary electric cooling fan that is not coming on in this situation? It should be in front of the AC condensing coil. There may be a switch tied to the system that is bad. This switch is sometimes activated by the pressure in the high-pressure line to the condenser coil. If there is not enough freon (134a) the pressure will not be high enough to activate the cooling fan switch. I recently added one can to my system and it made the fan run whereas it did not before adding the freon.

Jul 05, 2015 | AC Cars & Trucks

1 Answer

Toyota Corolla 1995. Quality of air conditioner reduced when stopped (traffic light) or moving at slow speed (condenced city traffic) No problem on the highway. Checked freon gas and fan. Understand that...


Normal, the ac heat exchanger condenser need air moving across the fins to remove the heat. While moving in town the condenser isn't remove the meat that is building up the it's aluminum fins. Even though the vehicle uses an electric fan. The fan is used to cool the engine temperature. If you Toyota is equip-ed with automatic transmission. The electric fan will need to pull enough air to cool the engine temperature, automatic transmission fluid, air conditioner condenser, and maybe power steering condenser to cool the power steering fluid. Later model of vehicles/trucks are using different refrigerants instead R134A in which you Toyota uses.

The simples way to explain is the ac remove heat from inside your Toyota and this heat is removed by the refrigerants inside your ac in the car. To cool the refrigerant this coolant is removed to the heat exchanger condenser located in front of the engine radiator. So, while moving at 60mph there is enough air flow through the radiator, ac head condenser, and other aluminum heat exchangers. GB...stewbison

Sep 12, 2011 | 1995 Toyota Corolla

2 Answers

The ac starts out cold and stays that way on hwy driving but starts blowing warm air in stop and go traffic. why?


Either clutch coil is heating up and letting go Or one of the sensors is defective. Or there is a restriction somewhere in the line (open up hood and look for frost on a/c lines.)

Sep 21, 2010 | 2001 Ford Taurus

1 Answer

I have 1997 mercedes-benz E320, the ac blows cold at 35 mph and over but warms up under that speed, i tried charging system last year but it acted the same


Check if condenser fan is working.
When a/c is on , electric fan on the radiator should come on.
If it's not , system may overheat and shut down , when you move there is natural air flow through condenser , when you stop , if fan is not on no air flow (cooling) through condenser , system pressure rising and safety switch shuts off the compressor.

Jul 25, 2010 | Mercedes-Benz E320 Cars & Trucks

7 Answers

My AC blows hot air at stop lights. It works great when the car is running on the free way, but does not work when the car slows down. Any idea what the problem is????


Have you radiator clutch fan check out, sounds like its bad, air blows through radiator and a/c condenser while driving and no air blows through at stops, will cause a/c pressure to go up and not cool.

Jul 14, 2010 | 2005 Chevrolet Equinox

1 Answer

I was traveling 5 to 10 miles an hours due to traffic for about 30 minutes. The aircon was on almost at the same time then suddenly, the engine temperature gauge went to red zone, which denote overheating....


When the Ac is put on the radiator fan would be working almost all the time. since you had been idling in the slow traffic there was no enough ventillation for the condenser to maybe shut off the AC and made it work hard. It is important to check if your radiator and cooling sections are alright. If in the first place there was less water inside, if so there would have been build up. Next if the radiator was blocked from the front it would have choked the cooling and resulted in the engine temperature building up. Please check for leaks in your radiator, flush the radiator and fill up with new coolant. check the pressure cap of the radiator for any fault replace.Finally check the engine performance , correct tuning/ timing , fuel supply.After you have identified any of this start the car and put onthe AC and put it on idling, check after 30 minutes for the radiator fan to cut off - the thermostat working fine- to finalise our fault. Hope this helps? Good day

Jul 13, 2010 | 2001 BMW 325

1 Answer

AC stops working when cabin temp reaches 109-110


indicates gas pressure and condenser cooling problems
check the condenser fan is working properly and have the gas pressures checked by gauges
check that the evaporator fins are clean and not blocked as ice build up will cause the same indications

Apr 07, 2017 | 1997 Audi A6

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