squish14

That's correct I think it was either this yrs model or 2015 they started putting the silica bags in. So they all had them in. I obviously don't have one anymore but would of probably been the cause of the issue. The fins are to Narrow to have any contamination come out when you remove it, they are just a difference in weight due to them being blocked. I'm by no means a mechanic, always sort of messed with bits and pieces motorbikes etc when I was younger, but if I'm being completely honest...it's not that bad of a job to do. Like I say, I did in in 2 hours.

I wish I had recorded it! Could maybe ask the garage if they could qoute to just change the core? Yeah I get what you mean with the ice in the windscreen! Absolute nightmare!! Let me know how you get on with it, if you do deicide to try it your self ill be more than happy to help where I can

Hi Christie, Yeah I've got the same, 2016 A4 B9 2.0 TDI. I had a garage do a flush, it didn't do much of anything at all interms of heat. However if you're planning on doing the heater core then I'd definitely get it flushed probably before doing so ( I stand to be corrected on this point ) that's just how I did mine and it's been fine ever since. Interms of the matrix the actual matrix is fine, it seems a lot of garages qoute for this just incase the core doesn't sort the issue ( from what I can gather ). Did they run any diagnostic on the actuators to see if they can manually operate the interals flaps? Opening/closing? I only had one guy actually do this on diagnostic. The core is between £60-£100 depending on brand, and it took me about 2hrs to do it. Was fairly simple... just a lot of screws in awkward places!

I had the same thing everything was getting hot that I could reach and also had a flush. But none of it sorted the rear heating or it actually getting to "High" temp. After changing the core everything is working

Yeah exactly that, the only extra thing I did was disconnect the battery because of unplugging the air bags from the glove box ( probably just me being over cautious) and also I did clamp the inlet pipes coming in the bulk head from the engine side. Just to hold any visual fluid... again right or wrong I've no idea!!! Other than that just a lot of screws!

Yeah I could not find one anywhere in the UK, I tried GSF, Eurocarparts and CEF and no one stocks them 🤷‍♂️. Autodoc is abit hit and miss, I've had stuff turn up in 2 days before. But being this time of year I think it took about 5 days.

Yeah that's the exact same scenario I had from the 1st 2 garage mate. I've posted a screenshot further up the chat of the Heatercore I bought on Autodoc.com.

It didn't come with new seals and fittings so you'd need to buy new. I shamefully used the old ones because I didn't realise it didn't come with them. The foam comes with the radiator you just need to stick it on your self, I just copied the old one like for like. So I'd already had 2 flushes on the system before this to see if it would solve the issues. Obviously it didn't, however the coolant I got out of the pipes at the core was clean! So I'm not worried of any deposits left in. Hope this helps

Hey, No I did everything from the passenger side. Unless they're planning on changing the whole Matrix?? The core replacement it's self, I wanted OEM ( They use Mahle) but no where had any in stock so I used these from Autodoc. ( see attached pick). As for your warranty they should definitely be covering it them selves!!! If you have finance go through them! It's much easier trust me.

RESULT!!! So I finally got round to swapping out the heater core and it's done the job! It took me a total of 2 hrs and I'm not a mechanic! Every garage I took it too either didn't want to do it or said it would be £1500 and 2 days to do it. I'd say give it ago your self, it's fairly straightforward. There's 2 things I'd change if I had to do it again... number 1 don't get drunk the night before 🤢 spent way to much time upside down for that! And 2. Get a flexi drill bit to get in the small spaces.. there's so many screws!!! I'd recommend whilst your there changing your pollen filter.. mine was disgusting! Also disconnect the battery first, for when your unplugging the air bags. Other than that the only additional thing I had to take off was the blower motor on the back of the pollen filter, this gives enough room to slide the core out, in turn of this undo the 2 bolts on the media unit and slide it forward an inch. It just helps with the room

Hey, Not much help but how did this go in the end? I'm having heating issues at the moment ( barely any warm air even when on "HI" and the rest only blows cold) did you have the same issues and did the heater core replacement solve the issue? Or was you getting no hot air at all? Thanks