Question about 1999 Volkswagen Passat

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There is a smell like antifreeze when I used the fan, especialy for the wind shield

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What is happening, is your starting to get a leak in your heater cord or the hoses that attach to it. it's allowing a small amount of coolant to leak out. check the passenger side of the car in the front just under the dash to see if it is damp. your heater core is behind the plastic wall under the dash. the vent right there is taking that smell of the coolant through the vents.

Posted on Jan 03, 2011

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Posted on Jan 02, 2017

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Ran good replace temp censor under intakemanifold checked everything 3times or more


IF YOUR GETTING A ROTTEN EGG SMELL IN THERE & HAVE A COOLING SYSTEM AND WINDING SOUND IT MAY BE A DIFFERENT ISSUE.EDUCATED GUESS?! IT COULD BE ANTIFREEZE LEEKING ONTO A BELT CAUSING A WINDING NOISE & A NASTY SMELL! LEAKING HEATER CORES SMELL LIKE ROTTEN EGGS BUT WATER PUMPS/ BAD & WET BELTS/PS PUMPS/ IDLERS/BEARINGS, ECT CAUSE WINDINGS MAY BE A COMBO OF PROBS TOO. GOOD LUCK FRANK M

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The wind shield foggs up unless the fan in fully.


This will happen when you have a moisture problem in you r vent system. This is usually caused by the heater core starting to leak. I need you to check the passenger side of the car, under the dash. feel around the floor for dampness( should be right under the plastic panel under the dash). Also do you smell a faint coolant odor? This may also happen if you have a seal leak around the blower housing under the hood, against the firewall. Check these and make sure. hope this helps

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Its now dought you need a new heater core its leaking. Thats why you can smell antifreeze and also where the mist on the windsheild is coming from there must be a wet spot on the floor on the middle to the passangers side aswell good luck

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I smell antifreeze,found no leaks,vehicle is not running hot


Its the heater core you smell it on the inside because the fan is blowing it into the vehicle antifreeze is unuswal stuff it forms a mist and becomes air borne even a small leak you will smell with the fan running look for wet spots on the carpet under the core but the mist may be so fine and you wonn;t feel it but this your problem

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Either its the heater core or the thermostat


your heater core is definitley leaking and your blower is pushing the vapor into the cabin. It will only get worse. You can minimize the smell by not running your heater or defroster, but you wont prevent the coolant from leaking and potentially getting worse. Sorry to say, the core will need pulled and repaired or replaced. Sometimes stop leak additives will solve the problem if its not too severe. I have never been a fan of them, its only a band aid in my view. also if u got pets afoid leeting they smell the antifreeze very toxic can kill pets easily. hope this helps. rate above 4* cheers

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look for loose conectors in the blower assembly or trash inside the intake duct from outside especialy around the fan resistors.

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