Aux Heater Servicing.

[Howz]

Update, so I searched for some suitable brushes to no avail, had a look at some power tools and stole a set of brushes out of one, a bit too big, but after a bit of use with the file got them to the tight size. The pump was a bugger to get off mainly because of access to the metal clips. After a bit of soldering and getting frustrated with trying to get the cotton thread on the brushes I got it all back together. Switch on and the pump is humming away :) the old brushes had hardly any Carbon left on them, however the aux exhaust is still not getting warm! Do I need to get the fault code cleared for it to work? Or is it something else like the diode?

 

PS. Thanks all for your help, there is no way I could have got this far without it.

Edited December 6, 2014 by Howz

[BrianH]

Update, so I searched for some suitable brushes to no avail, had a look at some power tools and stole a set of brushes out of one, a bit too big, but after a bit of use with the file got them to the tight size. The pump was a bugger to get off mainly because of access to the metal clips. After a bit of soldering and getting frustrated with trying to get the cotton thread on the brushes I got it all back together. Switch on and the pump is humming away :) the old brushes had hardly any Carbon left on them, however the aux exhaust is still not getting warm! Do I need to get the fault code cleared for it to work? Or is it something else like the diode?

 

PS. Thanks all for your help, there is no way I could have got this far without it.

 

I would suspect you need to clear it before it will fire up. Either way if there is another problem with it the same lead will assist you. You need a vcds lead and laptop and copy of vcds lite

 

Also the booster will only come on when its cold enough to trigger it.

[xavier]

thread was a right pain, I ended up going down the toothpick route.

[chromedome]

This sounds a very odd fix but bear with me. If you have climate control there is a small fan intake on the bottom left of the unit. If this gets clogged up the little sensor inside stops controlling the aux heater, aha I hear you say. try brushing and sucking any crud out of it using a hoover, do not suck for fear of legionnaires decease....................I'm serious after hearing about a Ford Bulletin on the matter.

 

How on earth the original poster tracked this one down I don't know but it can work. Give it a try. Of course clear any fault codes first.

[daddyfixit]

mines been smoking again in this cold weather spell;

 

gets a heater plug for

[Howz]

 

Update, so I searched for some suitable brushes to no avail, had a look at some power tools and stole a set of brushes out of one, a bit too big, but after a bit of use with the file got them to the tight size. The pump was a bugger to get off mainly because of access to the metal clips. After a bit of soldering and getting frustrated with trying to get the cotton thread on the brushes I got it all back together. Switch on and the pump is humming away :) the old brushes had hardly any Carbon left on them, however the aux exhaust is still not getting warm! Do I need to get the fault code cleared for it to work? Or is it something else like the diode?

PS. Thanks all for your help, there is no way I could have got this far without it.

 

 

I would suspect you need to clear it before it will fire up. Either way if there is another problem with it the same lead will assist you. You need a vcds lead and laptop and copy of vcds lite

 

Also the booster will only come on when its cold enough to trigger it.

Ok, bought a lead and downloaded software, all connected up, no fault codes for Aux Heater and it's still not working, even took out the sensor and bypassed it.

[xavier]

daddy - there's a good vid on youtube about servicing the heater, have a look if you haven't already.

 

howz - can vcds connect to the control unit successfully?

[Howz]

daddy - there's a good vid on youtube about servicing the heater, have a look if you haven't already.

 

howz - can vcds connect to the control unit successfully?

If I remember correctly there are 2 tests on vcds, one said no codes found and one said not connected successfully

[xavier]

In VCDS if you go into the block logging, can you see "useful" information, like heater temp (block 2 I think), block 1 shows what is "on" and what's "off". I've seen these been completely disconnected before, hence the questions.

[chrispb123456]

 

daddy - there's a good vid on youtube about servicing the heater, have a look if you haven't already.

 

howz - can vcds connect to the control unit successfully?

If I remember correctly there are 2 tests on vcds, one said no codes found and one said not connected successfully

 

Can you just confirm when you click on Aux heater does the controller open showing the heater address in green text if yes then you have the button to scan for codes, if you click the scan for codes does a message come back with no codes found or to many connection errors, or controller not found. 

[foru2justnv]

Hi

Hoping someone can help me out on this one.

Vw sharan 1.9tdi 115 auto 2001.

Never had aux heater working when I bought car. Plugged vcds in and came up with glow plug codes can't remember what code was

But got a new glow plug from tps

Edited January 8, 2015 by foru2justnv

[chrispb123456]

Flame out errors can be caused by fuel starvation when tank is low but more so if facing downhill, you will need to clear flame out codes for heater to start.

[foru2justnv]

Sorry I didnt mention that bit, yes I was clearing as they appeared then restarted car but after a while would come back, I am however

Going to put the front end up on ramps tomorow clear codes and try again, the only annoying thing with this is will I get a fault code every time fuel is slightly low as when I tried yesterday I had a fraction over half a tank

Regards

Tiff

[xavier]

I had problems with mine when it was under 1/2 a tank. Fill her up and see if that helps. Run on pump definately is working? Sharan's bigger than a passat and has the rear blower, heaters worth it when it's working (mine is, though is noisy when the fan slows down for the low temp setting.

[xavier]

Few flame outs from mine today, was below 1/2 way so filled her up. Back to running fine. Have a theory that it's either not priming quickly enough when lower on fuel or the pick-up's higher in the tank for the heater.

 

One thing I did notice a new error code I've not seen before, 1414. The fan is noisy and could probably do with a clean / lubrication. Given the temps involved I'm thinking either spray high temp grease, or silicone spray. Any suggestions. Likely to not be done until spring unless said heater "packs in".

[chrispb123456]

Few flame outs from mine today, was below 1/2 way so filled her up. Back to running fine. Have a theory that it's either not priming quickly enough when lower on fuel or the pick-up's higher in the tank for the heater.

 

One thing I did notice a new error code I've not seen before, 1414. The fan is noisy and could probably do with a clean / lubrication. Given the temps involved I'm thinking either spray high temp grease, or silicone spray. Any suggestions. Likely to not be done until spring unless said heater "packs in".

Fault code 01414 is combustion fan open circuit

[xavier]

Fan was fine this morning, not so fine this evening. Maybe time I fix the old heater that's in a box in the garage, I do have a glow plug for it.

 

Chris, can 01414 cover a number of different fan faults (I've seen "implausible signal" mentioned somewhere with 01414) or is it always open circuit?

[chrispb123456]

It may well have, signal outside specified, implausible signal, open circuit intermittent, short to ground.

They do suffer with getting tight on the bearings which puts extra load on the motor, a clean up and a drop of oil on the bearings may help.

Edited January 14, 2015 by chrispb123456

[Howz]

 

 

daddy - there's a good vid on youtube about servicing the heater, have a look if you haven't already.

 

howz - can vcds connect to the control unit successfully?

 

If I remember correctly there are 2 tests on vcds, one said no codes found and one said not connected successfully

Can you just confirm when you click on Aux heater does the controller open showing the heater address in green text if yes then you have the button to scan for codes, if you click the scan for codes does a message come back with no codes found or to many connection errors, or controller not found.

Ok, I have scanned again, no codes found on 2 of the tests for the aux heater (came up in green ok) but in the conv/comf tab at test 7D I get controller not found? Any ideas please? Ta!

Edited January 17, 2015 by Howz

[chrispb123456]

Will sort out the pin point test for you later today, this is done by doing several checks at the heaters multiplug.

I think you may have a configuration issue with VCDS.

Did you manage to see any faults on any of the other modules.

[Howz]

Yes, parking sensors which I know are faulty, 1 at back and 1 at front

[chrispb123456]

Here's the test, see how you get on.pinpoint test booster heater D5WZ.pdf

[Howz]

Thank Chris, that's fantastic, I'll let you know how I get on.

[GarryB]

Hi, I've read many any of the posts and info on the aux heater issues can anyone give me some advice.  I have a MKII with D5WZ heater.  Sometimes it fires up OK.  VCDS shows the temp getting to 315 and the car warms up - all OK.  Other times the car disappears in fog! but will then warm up.  I have previously changed the glow plug, I think the temp sensor seems OK.

VCDS on 03 and 04 shows the blower off and the pump off.  I only have the lite version so can't force these on.

Usually get the codes 01414 (combustion air blower signal outside specifications) and 01409.

Can anybody give me any pointers please?

Thanks

Garry

[xavier]

As above I found mine was better with more than 1/2 a tank of diesel. Low diesel caused a lot of my smoking issues. When you get fog do you get any noises? I would sometimes get a noise suggesting a bearing needed lubricated.