Question about 2001 Audi A4

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2001 Audi A4 2.8 no or little heat

No or little heat; was told by Audi dealer that heater core is plugged; did not quite belive them (I do not want the IP out);got water running through the heater core from return to inlet - took air out; car was good for 3 weeks then just luke warm air; got the water pump/thermostat/timming belt changed (I had that planned anyways) and no change....issue still there. Now if I pull the inlet hose while engine on and go higher RMP I do not get coolant flow toward core, engine and coolant temp are OK, coolant level OK. That means that the heater core is plugged??? I do not want the IP out, should I try one more time to unplug the core, any good procedures that I need to follow??

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  • A42001 Dec 10, 2008

    I was thinking abot this valve but I couldn't find it. Is it inside the hose that goes inside the heater core? Can I just buy a new one from an online store? Searching the internet did not help (for part, position or schematic).

  • raymie111 Jan 24, 2009

    I have the same issue with the heater in my A4, did fixing that valve work for you?

  • toc_4lyfe May 17, 2009

    i have a handful of problems like this my heater only works at high rpms or if eave it of for a while n turn it back on then it gets cold after a few secs and now my electric fan wont turn off and my coolant is orangy red and i recently found out that the 1996 a4 are blue and not red like the others



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There is a valvve that lets the coolant thru the heater core when heat is selcted then when it is off it goes thru thur the return instead of the heater core i bet your car is running a little off if it is the vavle works of a vacuum line and the vavle has a crack in it

Posted on Dec 10, 2008


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Re: 2001 Audi A4 2.8 no or little heat

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