The dreaded heater matrix

reverend-frog · 19-11-16, 04:41 PM

So I suddenly started getting a hissing sound and steam from behind the dashboard of my B4 coupe. Pulled over and called the AA.

AA guy bypassed the matrix using a wee bit of copper pipe.

But he thinks there is a serious airlock somewhere - he kept adding water to the expansion tank and when it heated up it still wasn't reaching the top hose. He kept squeezing it and he could feel there was no liquid flowing through it.

But when I looked in the passenger side footwells they were totally saturated. Does all this point towards the matrix going?

And will I be safe to drive it?

vorsprung durch technik · 19-11-16, 06:27 PM

It certainly sounds like it may well be. Did you also suffer with a smeery oily type substance on the windscreen as well?

sinbin5t · 19-11-16, 06:31 PM

Quote:

Originally Posted by vorsprung durch technik

It certainly sounds like it may well be. Did you also suffer with a smeery oily type substance on the windscreen as well?

Bit late for suntan oil now Mark

reverend-frog · 19-11-16, 06:32 PM

Quote:

Originally Posted by vorsprung durch technik

It certainly sounds like it may well be. Did you also suffer with a smeery oily type substance on the windscreen as well?

Can't say I did. The heater actually was working pretty well up to when the stream started pouring in!

sinbin5t · 19-11-16, 06:36 PM

I think it probably is ( but hope for you it isn't ) the heater matrix.

vorsprung durch technik · 19-11-16, 07:27 PM

"Mellow Yellow" is starting to look yellow with all the smearing he's been doing.

sinbin5t · 19-11-16, 07:33 PM

Quote:

Originally Posted by vorsprung durch technik

"Mellow Yellow" is starting to look yellow with all the smearing he's been doing.

19-11-16, 06:27 PM	#2
vorsprung durch technik 4 ring whore! Classic Audi Club Member Join Date: Feb 2014 Location: Near Watford. Posts: 7,753	It certainly sounds like it may well be. Did you also suffer with a smeery oily type substance on the windscreen as well?

19-11-16, 06:36 PM	#5
sinbin5t 4 ring whore! Classic Audi Club Member Join Date: Jan 2010 Location: Where a spike points skywards Posts: 12,960	I think it probably is ( but hope for you it isn't ) the heater matrix.

19-11-16, 07:27 PM	#6
vorsprung durch technik 4 ring whore! Classic Audi Club Member Join Date: Feb 2014 Location: Near Watford. Posts: 7,753	"Mellow Yellow" is starting to look yellow with all the smearing he's been doing.