Polo 6r heater fault - cold air only

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ihpj
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Polo 6r heater fault - cold air only

Post by ihpj » Mon Sep 18, 2017 11:49 pm

Please could I get some help with the following fault/issue with my Polo...

'61' 2011 (2012MY) Polo 6r 5 door MATCH. 1.4 petrol with 7 speed DSG. Climatronic (manual) A/C controls.


As the wether has started to get colder, I have found the interior heater only blows cold air, no matter what the temperature setting. The fan works on all 4 speed settings and the A/C + Recirculation controls work just fine. The blower direction (windscreen, feet only etc.) also does not work, as no matter which direction the airflow is set to, air is blown out the vents. The unit illuminates correctly when headlights are used. I have run a full VCDS on the car and zero faults come up with the HVAC.


BACKGROUND:
In the last 6 weeks I have replaced the RCD310 with a genuine RNS510 (LED type) and 9W7 bluetooth module. Prior to collecting the vehicle it had its timing belt and water pump (with coolant) changed.


SYMPTOMS:
As the vehicle was bought in May of this year, with the warm weather, I cannot recall testing to see if the heater actually worked. I do know the A/C works just fine. I can also recall, on an odd occasions, when turning the temperature knob, it was very stiff to turn. It kind of went to the 10-past the hour setting but wouldn't move further. Moving it back and then round again did not resolve the issue. Then on other times, it would rotate round just fine. When it was stuck I did force it a little and it would 'click' and then rotate round.


CONCERN:
When I installed the RNS510 I am pretty sure I did not disturb the heater controls. I have Google'd the module and see that it is an electrical connection on the rear (no push/pull rods). This says to me that these controls are electronic. Ergo, if there is a fault, I would expect VCDS to pick it up? But the odd thing is, VCDS is reporting zero faults with the HVAC system.

As the car was bought as an AUC from VW (Das Welt) I have booked it in to mu local Dealer for early October. However I am concerned:

* they might notice vehicle is modified from original spec. and claim Warranty is now void - Ill cross that bridge should I come it.
* could I have knocked the heater control unit somehow?
* it may be an airlock in the system as, when the coolant was changed, it wasn't bled properly? Engine appears to heat up just fine as the engine fan will kick in every so often.
* unit itself is faulty and needs replacing. If warranty won't cover it, then I'll buy a unit from the forum, is it P+P?

Any thoughts and a advice greatly appreciated!

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gaza1994
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Re: Polo 6r heater fault - cold air only

Post by gaza1994 » Tue Sep 19, 2017 12:08 am

I'd maybe take it out and have a look to make sure all the heater controls are in correctly!

When my mate swapped his stereo in his fiesta (different car I know) he did knock one of the cables that controls the heater and had similar symptoms!

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iichel
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Re: Polo 6r heater fault - cold air only

Post by iichel » Tue Sep 19, 2017 8:30 am

Is it a climatronic (with digital screen) or manual AC (with three round knobs)? Your second phrase confuses me a bit.
The vapour lock would disappear as soon as the engine reaches operating temperature and switches from small to large circulation. Don't worry. VW won't deny your claim due to the bluetooth or RNS, installing this doesn't have anything to do with the heater controls.

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Re: Polo 6r heater fault - cold air only

Post by RUM4MO » Tue Sep 19, 2017 9:33 am

Maybe consider that you might have more than one problem!

When the coolant is removed/replaced in that version of engine, it can take a lot of effort to get rid of any trapped air, it simply will not purge the air out by itself, I know this after having a similar problem with a 1.4 16V 85PS Ibiza when I replaced the engine coolant sensor.

The only way to get rid of any trapped air is:- remove the coolant filler cap, with a container of prefixed coolant in one hand, remove the engine temperature sensor, fill the coolant until air bubbles stop coming out of where the temperature sensor was, then refit the temperature sensor and fill the coolant up to the correct level - I only found that out after having heat/no heat problems!

It is a pity that VCDS does not reveal any problems with the flap motors though!

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iichel
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Re: Polo 6r heater fault - cold air only

Post by iichel » Tue Sep 19, 2017 10:04 am

VCDS is capable of showing trouble codes for the positioning motors of climatronic (digital display), i.e.:
https://vwforum.ro/topic/124137-scanare ... nt-2827409

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Re: Polo 6r heater fault - cold air only

Post by ihpj » Tue Sep 19, 2017 1:45 pm

Thank you to you all for taking the time to read and post.

For clarity, the car has the 3 dial (manual) A/C controls. I am going to VCDS it again tonight and will post up the log. I'm wondering if this is an airlock as I cannot believe I was that cack-handed in installing the RNS510 I damaged the manual controls in some way? I mean it is possible, but I'd really be surprised...

I'll try to run Google translate at the website you linked iichel and see if I can't delve into those diagnostics.
Last edited by ihpj on Mon Sep 25, 2017 10:57 pm, edited 1 time in total.

RUM4MO
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Re: Polo 6r heater fault - cold air only

Post by RUM4MO » Tue Sep 19, 2017 4:32 pm

One question, is VCDS able to connect to the HVAC, if it has completely failed VCDS might not be able to communicate with it, ie maybe the fuse that it uses has blown? When VCDS performs an auto scan, if any controllers are completely without power, they will not be able to communicate with VCDS, so as it does not know exactly which controllers are on a specific car due to options etc, in its default state when running auto scan, VCDS will just grab the list of controllers that range of cars might have, then sequentially try to communicate with them.

I've just scanned a friends old Passat to see if it will reveal what is wrong with some CCM controlled functions - no luck there as the CCM has now lost power so is invisible!

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iichel
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Re: Polo 6r heater fault - cold air only

Post by iichel » Tue Sep 19, 2017 5:06 pm

The presence of button background lighting indicates the that power, ground and convenience CAN are OK. the heating is manual AC, so I think the problem is more likely mechanic than electric.

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Re: Polo 6r heater fault - cold air only

Post by ihpj » Mon Sep 25, 2017 10:56 pm

Sorry for the delay in posting my VCDS scan log, I couldn't recall my password so was stuck trying to remember it :roll:

Anyhoo, below is my scan. I have obscured the VIN, and the turn signal error does result in bulb out warning on the dash intermittently. The heater and air flow direction controls do not work, and VCDS does not report any errors/faults. Car is booked into VW for early October.


Monday,25,September,2017,20:04:33:19599
VCDS -- Windows Based VAG/VAS Emulator Running on Windows Vista x86
VCDS Version: 17.1.3.0
Data version: 20170320 DS267.7
www.Ross-Tech.com


VIN: WVWZZZ6R********* License Plate:


Chassis Type: 6R (6N0)
Scan: 01 02 03 04 08 09 15 17 19 25 2E 37 44 56 77

VIN: WVWZZZ6R*********

01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
2E-Media Player 3 -- Status: OK 0000
37-Navigation -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
56-Radio -- Status: OK 0000
77-Telephone -- Status: OK 0000

-------------------------------------------------------------------------------
Address 01: Engine Labels: 03C-906-024-BXW.lbl
Part No SW: 03C 906 024 BJ HW: 03C 906 024 BH
Component: CGGB MM4HV 8997
Revision: --H09--- Serial number:
Coding: 0000077
Shop #: WSC 31414 790 31414
VCID: 67D66AB655215B7948-5120

No fault code found.
Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 02: Auto Trans Labels: 0AM-927-769.lbl
Part No SW: 0AM 300 052 A HW: 0AM 927 769 D
Component: GSG DSG AG7 431 2710
Revision: 00043014 Serial number: TFK01108090001
Coding: 0000020
Shop #: WSC 31414 790 31414
VCID: 29522C8E83B5AD099E-5102

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104) Labels: 6R0-907-37x-ESP82.clb
Part No SW: 6R0 907 379 AK HW: 6R0 907 379 AF
Component: ESP8.2i front H05 0001
Revision: --------
Coding: 230224E3416F00B3C42924E582D700801300
Shop #: WSC 31414 790 31414
VCID: 07164A36B261BB79A8-8052

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J301) Labels: None
Part No SW: 6R0 820 045 G HW: 6R0 820 045 G
Component: Man AC 02 0101
Revision: 0002S 02
VCID: 3260CBE26D63EED12F-8066

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519) Labels: 6R0-937-08x-09.clb
Part No SW: 6R0 937 087 K HW: 6R0 937 087
Component: BCM PQ25 H+4 H46 0251
Revision: BF046001 Serial number: 0434 204113695
Coding: 3DB02BBF08A10000003008002D2B0CD00040410F60060000200000000000
Shop #: WSC 12345 012 00001
VCID: 458A803ECCED69699A-8010

Subsystem 1 - Part No SW: 6R0 959 802 AB HW: 6R0 959 802 AB Labels: 6R0-959-802.CLB
Component: J386__TSG_FT 008 1611
Serial number: KU0KU020071100012862
Coding: 18BC30

Subsystem 2 - Part No SW: 6R0 959 801 AD HW: 6R0 959 801 AD Labels: 6R0-959-801.CLB
Component: J387__TSG_BT 008 1611
Serial number: KU0KU027071100014998
Coding: 08BC30

Subsystem 3 - Part No SW: 6R0 959 811 G HW: 6R0 959 811 G
Component: J388__TSG_HL 008 1611
Serial number: KU0KU022071100013510
Coding: 08BC32

Subsystem 4 - Part No SW: 6R0 959 812 G HW: 6R0 959 812 G
Component: J389__TSG_HR 008 1611
Serial number: KU0KU025071100016736
Coding: 08BC32

1 Fault Found:
00967 - Left Turn Signals
010 - Open or Short to Plus - Intermittent
Freeze Frame:
Fault Status: 00101010
Fault Priority: 2
Fault Frequency: 1
Reset counter: 38
Mileage: 72999 km
Time Indication: 0
Date: 2004.14.06
Time: 18:58:14


-------------------------------------------------------------------------------
Address 15: Airbags (J234) Labels: 5K0-959-655.clb
Part No SW: 6R0 959 655 K HW: 6R0 959 655 K
Component: VW10Airbag027 H09 0020
Revision: -------- Serial number: 003GX00T84Z%
Coding: 003237
Shop #: WSC 31414 790 31414
ASAM Dataset: EV_AirbaVW10BPAVW250 A01001
ROD: EV_AirbaVW10BPAVW250_VW25.rod
VCID: 4A90B302EDF3861177-801E

Crash sensor for side airbag: driver side:
Serial number: 3575HRB405N0NLV281R5

Crash sensor for side airbag: front passenger side:
Serial number: 3585HRB405R0N3MG8H3W

Crash sensor for side airbag: rear: driver side:
Serial number: 3515RRB405F0M98EJ8GR

Crash sensor for side airbag: rear: passenger side:
Serial number: 3525RRB40670N3MOE8U6

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285) Labels: 5K0-920-xxx-17.clb
Part No SW: 6R0 920 960 H HW: 6R0 920 960 H
Component: KOMBI H03 0505
Serial number: 00000000000000
Coding: 440801
Shop #: WSC 12345 012 00001
ASAM Dataset: EV_Kombi_cˇ_VDD_RM09 A04113
ROD: N/A
VCID: 3A70E3C2BD131691E7-806E

No ASAM data for: "EV_Kombi_cˇ_VDD_RM09" (VW36 *)
No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533) Labels: 6N0-909-901-6R.clb
Part No SW: 6N0 909 901 HW: 6R0 937 087
Component: GW-K-CAN TP20 H46 0251
Revision: BF046001
Coding: 000300
Shop #: WSC 12345 012 00001
VCID: 70E401EAA3EF9CC119-8024

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer (J334) Labels: 5K0-920-xxx-25.clb
Part No SW: 5K0 953 234 HW: 5K0 953 234
Component: IMMO H03 0505
Serial number:
Coding: 000000
Shop #: WSC 00000 000 00000
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03009
ROD: EV_Immo_UDS_VDD_RM09_VW21.rod
VCID: 6AD013828D33661157-803E

No fault code found.

-------------------------------------------------------------------------------
Address 2E: Media Player 3 (J650) Labels: 5N0-035-342.lbl
Part No SW: 5N0 035 342 E HW: 5N0 035 342 E
Component: SG EXT.PLAYER H13 0240
Revision: A1001003 Serial number: 7660528937
Coding: 010000
Shop #: WSC 31414 790 31414
VCID: 29522C8E40B5AD099E-807C

No fault code found.

-------------------------------------------------------------------------------
Address 37: Navigation (J0506) Labels: 1T0-035-680.clb
Part No SW: 1T0 035 680 P HW: 1T0 035 680 F
Component: RNS-MID H61 5269
Revision: AB001001 Serial number: VWZ6Z7L2301036
Coding: 00010400040000A00000
Shop #: WSC 12345 012 00001
VCID: 3B7EE6C6BA292F99FC-806E

Subsystem 1 - Part No: 1T0 919 859 B
Component: EU West V13 8348

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist Labels: 6Q0-423-156.clb
Part No: 6R0 423 156 B
Component: LenkhilfeTRW V277
Coding: 11220
Shop #: WSC 31414
VCID: 2F66C296EA51C33940-807A

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio (J0506) Labels: 1T0-035-680.clb
Part No SW: 1T0 035 680 P HW: 1T0 035 680 F
Component: RNS-MID H61 5269
Revision: AB001001 Serial number: VWZ6Z7L2301036
Coding: 00010400040000A00000
Shop #: WSC 12345 012 00001
VCID: 3B7EE6C6BA292F99FC-806E

Subsystem 1 - Part No: 1T0 919 859 B
Component: EU West V13 8348

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone (J412) Labels: 7P6-035-730.clb
Part No SW: 7P6 035 730 J HW: 7P6 035 730 J
Component: TELEFON H15 3200
Revision: 1B001001 Serial number: 00007664980870
Coding: 0211000100010110
Shop #: WSC 00152 210 91233
ASAM Dataset: EV_UHVNA 002720
ROD: EV_UHVNA_002.rod
VCID: 3972FCCEB8151D89EE-806C

No fault code found.

End-------------------------(Elapsed Time: 03:31)--------------------------

ihpj
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Re: Polo 6r heater fault - cold air only

Post by ihpj » Mon Sep 25, 2017 11:01 pm

And totally unrelated to the above issue, I have realised that although I have set a bluetooth code (4 digit set via VCDS) for Bluetooth, when pairing a new device it never seems to ask for it. I'm concerned anyone can potentially connect to Bluetooth in my car. The setup works fine, the 9W7 module is amazing as it streams Bluetooth audio in stereo and the MIC works an absolute treat for phonecalls. Everything works as it should so I'm prepared to live with if need be, but seems rather odd no code is asked for when pairing new devices?

Thank you, in advance...

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