Final part of replacing my 1999 Audi A4 Q heater core and blower motor. Also replaced the LCD screen in the instrument panel.
Final part of replacing my 1999 Audi A4 Q heater core and blower motor. Also replaced the LCD screen in the instrument panel.
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I think the reason it took me less time is because I’ve had the center console kick panels and instrument cluster of the car before. I had been driving with crappy heat for 2 years because I couldn’t figure out what was wrong had spent countless hours trying to diagnose anything the problem could possibly be from looking at the blend arms to Flushing three seperate times the heater core and checking the controls electronics etc.
I’m not doing it again anytime soon, but you remove the center console trim, remove to allen bolts holding the stereo/heat control assembely, remove kick panels under dash, remove passenger airbag, there is 2 bolts holding upper dash on from each end, remove them, don’t forget light sensor in middle vent. remove insturment cluster, pull dash up and back carefully but firmly
well both heater hoses should be
warm/hot weather or not you have the heater on, otherwise the core is blocked. if you had little pieces of foam coming out of your vents and you have warm air coming out of some vents and cold air coming out of others, it will be the flap foam is gone. check your flaps for proper operation first by looking at the arms
I suggest you post a video on how to get the upper dash off in an hour.
For anyone who hasn’t done this before, it will take more than an hour.
I took the entire the heater box out, took that apart completely because it had antifreeze leaked inside it. I took pictures of that unit before I disassembled it – a must.
I’m not answering your question, I know… but to get to the heater box at all, you have to dig, take the dash apart and keep exploring to get to the control motor. I dont think you have a choice. Remeber though, I’m not a mechanic.
Why do you suspect flaps?
What’s the best way to check if it’s the blend flaps before opening it all up? I *think* that’s my problem but I’m not sure. Also, if the problem is the blend flap motor can that be replaced without pulling the whole unit?
good job
I am not getting any heat either. I think it may be the flaps that open and close to expose the hot air but I am not certain. I’ve replaced the heatercore on an old vw jetta and dont want to do it again!
Do a search for A4 LCD display on Ebay.
I really don’t remember. I think I found it online by googling it.Sorry. I bought so many things for this car I lost track. Let me say this – its a delicate operation to replace the LCD. You need a hot air solderstation, a decent soldering iron, a magnifying lens, and some steady hands. I almost gave up because I ruined the first couple lines, but they weren’t used on the PCB so I continued. You need to be able to disassemble the instrument panel, and all the gauges. Plus put it all back.
Where did you get the LCD? I have an ’01 A4 with the same display problem. Will it fit an ’01?
Keep in mind in order to get the upper dash of you need to first Paul the center console and the lower Dash including the instrument panel. I have also found it wasn’t necessary for me to take the stereo out of the center stack like it says to do in the guide.
To anybody who has an OK heater core but just needs to resurface the blend flaps, you can actually do that as soon as you get the upper dash off, without taking the heater unit out which is the hardest part. It only takes about an hour to get the upper dash off and the flaps are right there in front when you do so
Yes – when I cleaned out duct work I replaced all the foam on the flaps.
Also to whom it may help I thought I would mention that at least in the 96 a4 you can take out the blower motor just by removing the glove box
I have to do this job now in my 96 a4 not because of the heater core though the blend flap door foam has deteriorated and now the heat and AC barely work. Obviously I will be replacing the heater core while I have it apart as well
Good Job Dude. Respect! Thanks!
In retrospect I had antifreeze in the duct work of the car dash. So – not only did I replace the core, I cleaned the duct work and replaced the blower motor. The air conditioning also runs thru the duct work of course – so that would of blown antifreeze on the windows and up my nose when on.
In retrospect, would it have been better hooking up a 12 volt heater like you mentioned at the start?
i want your car
very interesting , thank’s for sharing
Not sure… I’m not a mechanic.. only work on my own cars – but I would guess it would be, like you.. whats the problem w your car?
Do these instructions work for an 1997 Audi a4 v6 2.8?….I am guessing its going to be pretty similar