Webasto Remote Heater

I’d check the pump first and put an ear to the various bits if not using VCDS.

The rear driver wheel arch should start ticking slowly with the pump.

The front driver wheel arch should start humming loudly as the fan kicks on.

After a minute the pump should start to tick faster.

If the fan doesn’t spin the heater will shut off. If the pump doesn’t run it’ll shut off. If the flame doesn’t start or maintain after the glow plug turns off the heater will shut off. Flame failure. VCDS can help check which issue it is.

I replaced my heater - Fan seemed to have failed. Was grinding and not spinning easily. Previous garage had disconnected the air intake filter and left it loose.

I’ve had an issue before on my dads where it was just a bad connection to the pump. Some contact cleaner and reseated it and it was sorted.

I’ve seen people with coked up glow plugs where they needed cleaned or replaced (in campervans).

A fella is working on a project called Clonebasto which is a replacement ECU which would run from a 12v to pin 1 signal. No idea of cost yet.

Good luck.


Sent from my iPhone using Tapatalk
 
audifan said:
Failing that have the scan and tests done and see what faults are picked up.
If nothing has changed, lack of fuel to the Webasto or glow plug in the Webasto likely candidates.
Click to expand...
A quick scan with "supervag" shows 01412 glow plug with flame monitoring (Q8).
Deleted and started car.
Could feel air from exhaust for 30 seconds then stopped. Rechecked fault codes but none returned. Guessing the glow plug would be the first port of call? Anyone know where sells them and what are they like to change?
Cheers
Howey
 
Remember the car may either have sat unused or this was the first time the Webasto was needed this season. There is a chance the fuel line and pump contained debris or even some water. Both of which can cause burning problems with the Webasto. In the past I have herd of a small rodent nesting in the Webasto exhaust and it was completely blocked with its stored food. Personally I would try it half a dozen more times before doing anything. Only then I would look into the possibility of removing the glow plug to assess its condition and probably give it a good clean. Do not know how easy it is to remove the plug nor what tools are needed. The electrical plugs could have corroded so that would also be something to check.
From what you have said it did sound like the Webasto started but either did not get the signal to increase the fuel flow to the pump, fuel bad or dirty plug not getting the system hot enough to supply more fuel and the flame going out.
As for sourcing a replacement plug... EXPENSIVE if from Audi but nobody has been able to confirm a part available from Webasto is suitable for the A2 ( much cheaper than the Audi price ). Do a bit of searching and you will find the Audi part number and price.
 
From the manual


Display on VAS 5051 and output at printer
​
Possible causes of fault
​
Fault remedy
​
01411
Temperature sensor -G18
*Defective
​
- Fault in additional heater control unit -J162.
​
- Replace additional heater.
​
01412
Glow plug with flame detector -Q8.
*Implausible signal
*Open circuit
*Short to positive
*Short to earth
​
- Fault in wiring between heater control unit -J162 and glow plug with flame detector -Q8.
Glow plug with flame detector -Q8 defective.
Fault in additional heater control unit -J162.
​
- Perform final control diagnosis
Replace additional heater.​
NOT very helpfull
 
audifan said:
From the manual


Display on VAS 5051 and output at printer
​
Possible causes of fault
​
Fault remedy
​
01411
Temperature sensor -G18
*Defective
​
- Fault in additional heater control unit -J162.
​
- Replace additional heater.
​
01412
Glow plug with flame detector -Q8.
*Implausible signal
*Open circuit
*Short to positive
*Short to earth
​
- Fault in wiring between heater control unit -J162 and glow plug with flame detector -Q8.
Glow plug with flame detector -Q8 defective.
Fault in additional heater control unit -J162.
​
- Perform final control diagnosis
Replace additional heater.​
NOT very helpfull
Click to expand...
Actually is very helpful in the fact i know my supervag has read the fault correctly! In the summer it was unable to read a brake light switch fault with my dads galaxy which in my book is a bread and butter fault code that said his tailgate wiring was in a seriously poor condition with around 10 damaged wires!!
 
audifan said:
Remember the car may either have sat unused or this was the first time the Webasto was needed this season. There is a chance the fuel line and pump contained debris or even some water. Both of which can cause burning problems with the Webasto. In the past I have herd of a small rodent nesting in the Webasto exhaust and it was completely blocked with its stored food. Personally I would try it half a dozen more times before doing anything. Only then I would look into the possibility of removing the glow plug to assess its condition and probably give it a good clean. Do not know how easy it is to remove the plug nor what tools are needed. The electrical plugs could have corroded so that would also be something to check.
From what you have said it did sound like the Webasto started but either did not get the signal to increase the fuel flow to the pump, fuel bad or dirty plug not getting the system hot enough to supply more fuel and the flame going out.
As for sourcing a replacement plug... EXPENSIVE if from Audi but nobody has been able to confirm a part available from Webasto is suitable for the A2 ( much cheaper than the Audi price ). Do a bit of searching and you will find the Audi part number and price.
Click to expand...
Many thanks!!
If its big bucks it will stay broke lol!! Will keep trying it to see if it fixes itself, pleased that it tried to run thou!
 
Ok so a very quick google using the model that was suspected (thermo top E prior to 2004) points towards
1322639A
92995D
Melloronline.co.uk are very local to me and seem to have best price but even so with the glow plug not seemingly availible seperate and parts around £200 i think mine will have to remain inop!
 
audifan said:
As for sourcing a replacement plug... EXPENSIVE if from Audi but nobody has been able to confirm a part available from Webasto is suitable for the A2 ( much cheaper than the Audi price ). Do a bit of searching and you will find the Audi part number and price.
Click to expand...

this: https://www.standheizung-braun.de/p...-fuer-standheizungen-thermo-top-e-c-p-diesel/ that's €150.

Audi part was 4E0 261 433 C if I read correctly.
The thermo test software is what I was referring to earlier and should allow better diagnostics.

- Bret
 
Well that explains the cost. It is not just the plug but looks like the whole combustion chamber. Bret that is a good price. Audi more than double that if it can be obtained without a huge lead time.
 
That is getting a bit closer to the Audi price, but still cheaper. So far if you are going to get the chamber replaced the one Bret has linked to looks like the cheaper option. Factor in shipping costs and time when thinking of ordering.

£219.54 now on the site @steveb provided above.
 
audifan said:
Remember the car may either have sat unused or this was the first time the Webasto was needed this season. There is a chance the fuel line and pump contained debris or even some water. Both of which can cause burning problems with the Webasto. In the past I have herd of a small rodent nesting in the Webasto exhaust and it was completely blocked with its stored food. Personally I would try it half a dozen more times before doing anything. Only then I would look into the possibility of removing the glow plug to assess its condition and probably give it a good clean. Do not know how easy it is to remove the plug nor what tools are needed. The electrical plugs could have corroded so that would also be something to check.
From what you have said it did sound like the Webasto started but either did not get the signal to increase the fuel flow to the pump, fuel bad or dirty plug not getting the system hot enough to supply more fuel and the flame going out.
As for sourcing a replacement plug... EXPENSIVE if from Audi but nobody has been able to confirm a part available from Webasto is suitable for the A2 ( much cheaper than the Audi price ). Do a bit of searching and you will find the Audi part number and price.
Click to expand...
You was right!!!

Having spent a while researching how the heater opperates i realised the fan starts fast then slows, then kicks the fuel pump in so it needs a good min to get going. Just tried it again with frost now on the screen and i am chuffed to little mint balls!! Fired up, bit of smoke, cleared then lovely and clean with warmth starting in cab in around 2 mins!!
 
Howey said:
You was right!!!

Having spent a while researching how the heater opperates i realised the fan starts fast then slows, then kicks the fuel pump in so it needs a good min to get going. Just tried it again with frost now on the screen and i am chuffed to little mint balls!! Fired up, bit of smoke, cleared then lovely and clean with warmth starting in cab in around 2 mins!!
Click to expand...
But What did you do?
 
Elpres said:
But What did you do?
Click to expand...
Tried it again! I had tried it on a short run but not felt anything, then just prior to posting tried again but falsely assumed that when i felt the exhaust stop after 20 secs it had stopped working so upon learning how the fan initialises and therefore air flow thru exhaust, using diag kit read faults in aux heater (18) a fault was stored for glow plug, cleared and tried it again and success!! Will check to see if faults returned asap
 
Re read for faults in aux heater (18) and none have returned, can only think (and hope) the fault code stored was inherited from the replacement ecu and until cleared stopped the heater working, this would tally as not tried the heater with this ecu, but the jurys still out tbh!
 
Tbh not sure if its working spot on or intermitent as not being using the car much to confirm but will update when i know more!
 
Howey said:
Tbh not sure if its working spot on or intermitent as not being using the car much to confirm but will update when i know more!
Click to expand...
Hi Howie,
I’ve had similar trouble with mine since the MOT, interestingly I stopped using 2 stroke oil in case it failed the mot on emissions.
Found my bottle of oil added to a tank of shell standard diesel & it’s purring away in the cold temperatures.
Hth
Keith
 
You must log in or register to reply here.
Back
Top