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The Dreaded Aux Heater

Started by SirDavidAlhambra, November 28, 2021, 09:27:40 PM

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Hi guys, the aux heater in my Alhamb isn't working and I was wondering if it's worth borthering trying to fix it.

Sounds like it could be fiddly and a lot of hassle.

But is it worth it I wonder?

Thank You
I drive a Seat Alhambra 1.9Tdi which has 115bhp and an automatic gearbox.

I am happy to help you with all your questions. I am not a qualified mechanic but seem to be better at fixing my car than even the most experienced garages.

I have lots of friends here and very much enjoy talking with you all. Always remember, a motor car is a serious tool and should be treated with respect. Put your safety first, always.

All depends what's wrong with it and what model it is really. If it's the older style then they tend to be repaired more easily. The later types typically require the unit replacing due to the control unit failing. Makes a big difference having it working in low ambient temperatures though.

A 2006 is likely to be the Z model with the dodgy circuit board tbh. It does make a massive difference as said though and with these being so thermally efficient, it arguably reduces start up engine wear as the oil temperature reaches service temp quicker.
03 Ford Galaxy 1.9 TDI 115 Ghia in Spruce Green Metallic
With cream leather interior, Full Bodykit, Remapped at 145bhp, Lowered on 18's
13 Porsche Cayenne 3.0 V6 Diesel in Umber Metallic
262Bhp AWD and Factory fresh...for now!
58 Ford Transit 2.2 TDI 115 in Frozen White
With retrofitted everything except another slidey door! :)
LAUNCH X431 Pad PRO - Scanning & Coding for all makes and models done in Wiltshire in exchange for winegums! :)

Thank you both. I think this is the sort of task that would be beyond my expertise so I think I will need to take it to the garage. Do you think it would be likely to be a pricey sort of thing to fix? Obviously it will depend on the specifics but just trying to work out if we're talking an inevitable black hole of money here or something that is typically a nice cheap easy fix  :)
I drive a Seat Alhambra 1.9Tdi which has 115bhp and an automatic gearbox.

I am happy to help you with all your questions. I am not a qualified mechanic but seem to be better at fixing my car than even the most experienced garages.

I have lots of friends here and very much enjoy talking with you all. Always remember, a motor car is a serious tool and should be treated with respect. Put your safety first, always.

Scan it for the fault codes and that will give us a better idea of the failure. A garage isn't going to be cheap tbh, the failure of the Z is normally the heaters ECU which is only repairable with VERY specialist equipment which means it's nearly always a swap-out. It's unlikely a garage will want to swap a second hand unit in either :(

Scan the codes first though...
03 Ford Galaxy 1.9 TDI 115 Ghia in Spruce Green Metallic
With cream leather interior, Full Bodykit, Remapped at 145bhp, Lowered on 18's
13 Porsche Cayenne 3.0 V6 Diesel in Umber Metallic
262Bhp AWD and Factory fresh...for now!
58 Ford Transit 2.2 TDI 115 in Frozen White
With retrofitted everything except another slidey door! :)
LAUNCH X431 Pad PRO - Scanning & Coding for all makes and models done in Wiltshire in exchange for winegums! :)

I like the aux heater on my Galaxy. Like Mirez says, you need to scan it. When there are fault codes it won't switch on anymore and there can be lots of faults like a seized fan, faulty glow plug, faulty fuel pump,... If you can get it running I advise to install a switch somewhere in the cabin inline with the outside temperature sensor installed under the windschreen wiper system to switch the heater on on the longer rides. Short runs are not good for the aux heater.

My aux heater failed two times because of a worn glow plug and a burnt strainer.
I own a MK1 1999 2.3 DOHC Ghia & 2003 1.9TDI Trend.

Dismantling these heaters can also be problematic getting the small torx head screws undone, they can snap off or round off making it necessary to drill out and re tap, not an easy fix.
You must give the unit a good soaking in penetrating fluid before attempting to dismantle.
2016 Vauxhall Insignia Elite Nav in White 2.0CDTI Manual.
2009 Kia Sedona GS In Black 2.9CRDI 183PS. 5 Speed Manual WAV.
2003 MK2 Galaxy Ghia In Solid Black 1.9 TDI 115PS. 5 Speed Automatic.
Upgraded Eberspaecher booster heater to independent heating with 7 day timer.

With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me. All for a pint of Strongbow.

Thank you all, I will plug up the laptop microcomputer to the car and will extract the codes... I am hopeful I will be able to do that this evening. I will also give the exhaust heater thing a good spray over in PlusGas ready for if it goes to the garage. I am hopeful it will be something nice and easy like a new glow plug or suchlike but I bet it won't be! He he. Would be nice to have it working though, now that the chilly months are upon us.
I drive a Seat Alhambra 1.9Tdi which has 115bhp and an automatic gearbox.

I am happy to help you with all your questions. I am not a qualified mechanic but seem to be better at fixing my car than even the most experienced garages.

I have lots of friends here and very much enjoy talking with you all. Always remember, a motor car is a serious tool and should be treated with respect. Put your safety first, always.

Hi guys, I did a scan and this is what I got... Does jt mean anything to any of you please? Thank you

VCDS-Lite Version: Release 1.2
Tuesday, 30 November 2021, 20:12:24.
Control Module Part Number: 7M3 815 071 C
  Component and/or Version: HEIZG. B/D5W       0001
           Software Coding:
            Work Shop Code:
                      VCID: 301393C3E33B
5 Faults Found:
01492 -  Function Lock-Out
        35-00 -   -
01409 - Shareware Version. To Decode all DTCs
        35-00 - Please Register/Activate
01409 - Shareware Version. To Decode all DTCs
        35-00 - Please Register/Activate
01414 -  Combustion-Air Blower (V6)
        16-00 -  Signal Outside Specifications
01414 - Shareware Version. To Decode all DTCs
        36-00 - Please Register/Activate
I drive a Seat Alhambra 1.9Tdi which has 115bhp and an automatic gearbox.

I am happy to help you with all your questions. I am not a qualified mechanic but seem to be better at fixing my car than even the most experienced garages.

I have lots of friends here and very much enjoy talking with you all. Always remember, a motor car is a serious tool and should be treated with respect. Put your safety first, always.

01492 is locked out because of failed ignition attempts.

01409 is repeated flame outs

01414 is combustion fan code.

You could get lucky and just have a failed combustion fan but I still wouldn't rule out the ECU being fried.
Try clearing the codes and bridge the temp stat to see if it attempts to fire up,you should get some noise from dosing pump and combustion fan while it's trying to fire.

If I was you I would make a note of the codes which are flame out and combustion motor
Clear the codes then start the car assuming its below 10 degrees it would normally start, if no start rescan see if they come back.
2016 Vauxhall Insignia Elite Nav in White 2.0CDTI Manual.
2009 Kia Sedona GS In Black 2.9CRDI 183PS. 5 Speed Manual WAV.
2003 MK2 Galaxy Ghia In Solid Black 1.9 TDI 115PS. 5 Speed Automatic.
Upgraded Eberspaecher booster heater to independent heating with 7 day timer.

With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me. All for a pint of Strongbow.

Hi everyone, I cleared the codes and then the same ones came back again... hmm, I wonder what it could mean
I drive a Seat Alhambra 1.9Tdi which has 115bhp and an automatic gearbox.

I am happy to help you with all your questions. I am not a qualified mechanic but seem to be better at fixing my car than even the most experienced garages.

I have lots of friends here and very much enjoy talking with you all. Always remember, a motor car is a serious tool and should be treated with respect. Put your safety first, always.

New available here if you want a quick fix

https://standheizung-ersatzteile.com/shop/en/hydronic-2-d5z-f-12v-vw-mpv

Or remove the heater and try and get it repaired but it's been said before the controller is the culprit and is the most expensive part, you'd have to be very lucky to find a good second hand one.
These jobs need to be sorted during the summer months not wait until the winter.
2016 Vauxhall Insignia Elite Nav in White 2.0CDTI Manual.
2009 Kia Sedona GS In Black 2.9CRDI 183PS. 5 Speed Manual WAV.
2003 MK2 Galaxy Ghia In Solid Black 1.9 TDI 115PS. 5 Speed Automatic.
Upgraded Eberspaecher booster heater to independent heating with 7 day timer.

With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me. All for a pint of Strongbow.

Thank u... sounds like it could be pricey, was hoping it might just be a case of changing a glow plug or suchlike, may have to go back to the drawing board
I drive a Seat Alhambra 1.9Tdi which has 115bhp and an automatic gearbox.

I am happy to help you with all your questions. I am not a qualified mechanic but seem to be better at fixing my car than even the most experienced garages.

I have lots of friends here and very much enjoy talking with you all. Always remember, a motor car is a serious tool and should be treated with respect. Put your safety first, always.