Question about 2001 Audi A4

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Re: 2001 Audi A4 2.8 no or little heat

Thank you for your advise; I was thinking abot this valve but I couldn't find it. Is it inside the hose that goes to 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). I would just replace part if I would now how to find it or how it looks.

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  • A42001 Dec 11, 2008

    I did more digging plus I called dealer and it looks that my car does not have a heater valve (2001 A4). At this point in time I think that I might deal with a partially plugged heater core (I get ony a small stream of coolant @ heater core return). I checked today and the inlet hose to the core was hot and the return only luke warm. I'd like to find a good way of unplugging the core.



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I cant find any pics but it should be between the the water pump and heater core or it could even be inside the water pump

Posted on Dec 11, 2008

  • Bryan Howald Dec 11, 2008

    ok then take an air comp blow nozzel and blow thru the return on the heater with both line of it the clog should come out then flush with water till it flows freely



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No heat in car, prestone level good, water pump new, heatercore seems ok. Electric control panel, no vaccum hoses. Please help!!!

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It sounds like the heater control valve may be stuck. This valve allows heated water from the engine to pass through the heater core which in turn heats the inside of your car. If this valve is stuck, only a small portion of heated water will pass through. If this is the case, you should have the control valve replace.

You should be able to find it by following the heater hoses coming from the radiator leading back to the firewall. These hoses will about 1/2 - 3/4 of an inch in diameter so you shouldn't get them confused with the normal radiator hoses.

You can probably purchase a new valve at an auto parts store but I'm sure the dealer will have one.

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1 Answer


If you can cut the heater hoses off from the heater core at the fire-wall, and then use a piece of pipe or a hose adapter and hose clamps to join or connect the two heater hoses together, then you can actually drive the vehicle until you require heat from the heater core inside the passenger compartment of the vehicle.


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1 Answer

2001 Audi A4 2.8 no or little heat

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

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