Question about 2004 BMW 318i Touring

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Why bmw e46 318i heater not blowing hot air? - 2004 BMW 318i Touring

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  • BMW Master
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Hi there anonymous,

The BMW has a very precise method the bleed air from the cooling system. My best advice is to get the FACTORY manuals for your car... Some cars the bleeder is quite OBVIOUS on the ENGINE side of the TOP radiator hose.

It can take several runs to get the air completely out (not done on a hot engine).

Before I ultimately folded and purchased my set
535i, 1986 paper set.. I successfully used Bentley books...

If you are not up to the price of paper books... CD can be also purchased on-line... check out amazon & eBay.


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Posted on Sep 22, 2016

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  • Contributor
  • 38 Answers

You low on rad fluid? Most common reason.

Posted on Sep 22, 2016

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Posted on Jan 02, 2017

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SOURCE: 94 bmw 318iC Heater not working

1st thing to check is the coolant level. Low coolant level results in no, or little heat (not enough coolant to circulate thru the heater core). What does your engine temp gauge indicate? (or is it just a warning light?) If the car is running at what appears to be lower than normal temp., u may have a thermostat that's stuck open. This would cause the engine to not reach operating temp, and u would not have heat. Check the above 2 items 1st, then let me know what u found. If that doesn't fix it, we will continue, let's do the easy and not too expensive stuff 1st!

Posted on Nov 17, 2008

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SOURCE: BMW 325xi 04 Heater Fan working (sound) but not blowing any air.

motor is going bad replace it

Posted on Dec 11, 2008

  • 1 Answer

SOURCE: heater blower not working

Possibly the final stage resistor (hedgehog)

Posted on Jun 21, 2009

  • 14 Answers

SOURCE: heater blows cold air

Check there is water in it first. A black cap on top of the radiator. If the level is ok then a wee red dipstick should float up.

Posted on Dec 12, 2009

  • 395 Answers

SOURCE: i have bmw 318ci and the hot air is not working,

The heater operates from the hot water from the engine cooling system flowing through the heater radiator which is inside the air ducts under the dash. I suspect that the control wire/cable that goes from the heater control lever has broken or become disconnected from the heater tap that controls the volume of hot water through the heater radiator. Some times there is also a flap in the air ducts that is operated by the heater lever tha varies the amount of air that is heated. The tap may be in the engine bay or tucked in behind the air ducting.

Posted on Aug 31, 2010

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1 Answer

My 97 bmw i put water in it and didnt bleed it now the heater is blowing out cold air can someone please help me?


Did it blow hot air before you put water in it? Why did you put water in it? It's supposed to use a 50/50 coolant mixture.

Did you overheat the motor and it quit?

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I have bmw 318ci and the hot air is not working, the heater is blowing and set to max heat but only blowing cold air, i have checked the fuse box, any ideas??


The heater operates from the hot water from the engine cooling system flowing through the heater radiator which is inside the air ducts under the dash. I suspect that the control wire/cable that goes from the heater control lever has broken or become disconnected from the heater tap that controls the volume of hot water through the heater radiator. Some times there is also a flap in the air ducts that is operated by the heater lever tha varies the amount of air that is heated. The tap may be in the engine bay or tucked in behind the air ducting.

Aug 31, 2010 | 2000 BMW 3 Series

1 Answer

Hi,my 1995 bmw 316i only blows cold air.even when the temp control is full at red it blows ice cold air,thanks.rod


check hot water is circulating through heater rad by feeling the inlet and outlet pipes as they come thru the bulkhead if ok it sounds like there is a control panel prob, if hot water isnt circulating make sure cooling system is bled properly, and you could try backflushing the system.

Jul 06, 2010 | 1994 BMW 3 Series

2 Answers

Heater blower not working


It sounds like your cabin air filter has stopped up common problem on these cars. You have to remove the glovebox to get to it. If this filter stops up, your fan will be running on high but hardly anything will come out of the vents.

May 31, 2009 | 2001 BMW 325

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