Heater Mystery !

[anma3178]

Hey peeps.

 

So, on my list of probs that we're currently having with our new (used) 2001 Ghia, was one with the heaters.

 

When you start the car up, the heater control display will flash for about 10ses, and then go constant, which I'm told means that the aircon needs re-gassing, so will check that once the thing is actually working....

 

Ok, then when you try to get the heater going... on any bar... there is nothing.. nada !! The fans don't even attempt to spin. This is both rear and front.

 

We have taken the fan out... it spins.. and we've powered it independently and it whirred away.

 

We've also changed the hedgehog... nothing.

 

One thing we have noticed is.. as soon as you turn the ingnition to the first turn, and fiddle with the settings, there is a hum coming from the heater display unit... ??

[mk2vr6]

small sensor to check the air temp in the panel that has a fan in it to draw the cabin air over it, look closely and you'll see the grill

[anma3178]

small sensor to check the air temp in the panel that has a fan in it to draw the cabin air over it, look closely and you'll see the grill

 

 

Do you think it may be worth just replacing the unit then... I've seen them on ebay from breakers...

[anma3178]

small sensor to check the air temp in the panel that has a fan in it to draw the cabin air over it, look closely and you'll see the grill

 

 

Do you think it may be worth just replacing the unit then... I've seen them on ebay from breakers...

 

 

Maybe not... can't find one on ebay at all :)

[frogeye]

Hi Anma,

 

The flashing display indicates a fault with the climate control system, not necessarily a need for a re-gas. If you get hold of a lead and vagcom software you should be able to read the fault codes that the unit is flashing about. The software will also give a readout for the voltages going to your fan/s which may help you.

 

When I got my V6 the climate control unit was covered in a sticky mess, probably due to split drinks in the badly placed cup holders overhead. I managed to disassemble the unit and clean up the buttons but my unit still sometimes changes the fan speeds itself! My a/c isn't blowing cold inspite of a regas and is a project I hope to set on once the weather picks up a bit.

 

Frogeye

[anma3178]

Hi Anma,

 

The flashing display indicates a fault with the climate control system, not necessarily a need for a re-gas. If you get hold of a lead and vagcom software you should be able to read the fault codes that the unit is flashing about. The software will also give a readout for the voltages going to your fan/s which may help you.

 

When I got my V6 the climate control unit was covered in a sticky mess, probably due to split drinks in the badly placed cup holders overhead. I managed to disassemble the unit and clean up the buttons but my unit still sometimes changes the fan speeds itself! My a/c isn't blowing cold inspite of a regas and is a project I hope to set on once the weather picks up a bit.

 

Frogeye

 

 

Cheers for that !! We are having it read tomorrow morning. I'll let you know what it says !!!

 

Thank You to everyone here.... I'm slowly learning alot !!!! :)

[Jayton]

If you need a VAG-COM scan I'm Wallingford if that's close to you? :)

[seatkid]

Check the fuses first. :)

[Frantic]

If you do end up needing a regas too.. kwik fit are doing them for

[anma3178]

If you need a VAG-COM scan I'm Wallingford if that's close to you? :D

 

Cheers for the offer !!! Had it done today and all it showed were 2 ignition coils need doing !! Well chuffed... although, could it show something else when they're replaced.. ???

 

Check the fuses first. :)

 

We've ummed and ahhed about that, but not sure which ones it would be... the dealer said they worked fine when he picked the car up... We don't have the book for it, and even if we did, everyone on here has said that the fuses are never where they're meant to be.... I'm typing this and thinking it looks really stupid that we've not checked the fuses !! :) :)

[anma3178]

If you do end up needing a regas too.. kwik fit are doing them for

[Jayton]

If you need a VAG-COM scan I'm Wallingford if that's close to you? :lol:

 

Cheers for the offer !!! Had it done today and all it showed were 2 ignition coils need doing !! Well chuffed... although, could it show something else when they're replaced.. ???

 

 

Did you have problems starting the car and with it running? Did they clear the codes? It's advised that you get the codes cleared first then drive it around for a few days and recheck the codes as the fault could have been logged, items replaced and codes never cleared.

[anma3178]

Got the car back today. Faults showed 2 coil packs and camshaft sensor. Nothing about the heating/cc at all... and it's still not working :/

[dave030445]

Got the car back today. Faults showed 2 coil packs and camshaft sensor. Nothing about the heating/cc at all... and it's still not working :/

did they do a full scan or did they just scan the engine

[anma3178]

Got the car back today. Faults showed 2 coil packs and camshaft sensor. Nothing about the heating/cc at all... and it's still not working :/

did they do a full scan or did they just scan the engine

 

Ah, I wasn't aware of this. I would've thought he only did an engine check, as we never really went into the Heater issue with him. Thanks... need to get it read again...

 

I do have a new heater control unit coming tomorrow, so I'll try that next.

 

One question.... I've literally just been playing about with the unit. There is a fan noise coming from the little front left grill next to the buttons, which when I blow into it, it speeds the fan noise up... is this the sensor that was mentioned earlier in the thread?

Edited February 9, 2010 by anma3178

[Jayton]

If you need a scan for the Aux heater (i'll do it FOC of course), it will also help me know whether my cable/software is just not communicating with my aux heater module. So it helps us both :16:

[anma3178]

If you need a scan for the Aux heater (i'll do it FOC of course), it will also help me know whether my cable/software is just not communicating with my aux heater module. So it helps us both :)

 

That would be Fab !!! I don't know if ours has an AH though.... :lol: Would be much appreciated though, as today the engine management light is back on again.. along with a little yellow warning triangle with a circle around it ? I'm losing the will to live with it to be honest :( We've had the ignition coils done.. light still on... then camshaft sensor changed, then the light went off for a day. And now back on again.... grrrrrrrr :16:

[big_kev]

I don't know if ours has an AH though....

 

you do not.

[anma3178]

I don't know if ours has an AH though....

 

you do not.

 

didn't think so.

[Jayton]

Oops! Forgot you have the 2.8 V6 :16:

 

I can still do the VAG-COM Scan if you like :lol:

 

PM me your town and I'll see how far you are and when I can come over or something :(

[anma3178]

Oops! Forgot you have the 2.8 V6 :16:

 

I can still do the VAG-COM Scan if you like :lol:

 

PM me your town and I'll see how far you are and when I can come over or something :)

 

hehe !! I live just outside Oxford, Witney... If it's too far don't worry... I can pay you in bacon butties and coffee while you and hubby go and play cars!!! :(

[Jayton]

I work in North Oxford so could easily hop on the A40 car park after work ;)

 

I'll PM you which evenings I can make it over to Witney when I get home from work :unsure:

 

At the mo I'm thinking tomorrow evening or Friday evening.

[anma3178]

Hey Jayton !!!

 

Thank You sooo much for coming out tonight !! :)

 

I'm not an alcoholic, honest !! hehe !! Wine is my escape on a Friday night... although as you saw, my kids were still running riot, so not much of an escape !! Do you have a VAG-COM for children... you'd be onto a winner if you did !!

 

Feel free to update on here what you found on our Gals reading.. let others know what a shed she is :) We NEED a diesel !!

 

 

Thanks Again, you're a true Gent offering to come out and read our Gal, straight after work on a Friday night.. BEFORE your dinner !!!!

 

:D

[Jayton]

Hey :)

 

No probs, just glad to be able to help.

 

I'm glad we managed to clear the ESP light, or has it come back like the engine management light did?

 

 

I've uploaded both text files with the error codes(DTC's) , the large one is the original list and the smaller one is the same error that kept coming back.

 

 

Module - 03

VAG-COM Version: Release 409.1-S

 

Control Module Part Number: 7M3 907 379 B

Component and/or Version: ESP 20 CAN V005

Software Coding: 18440

Work Shop Code: WSC 00020

1 Fault Found:

01423 - Lateral Acceleration Sensor (G200)

57-00 - Electric Circuit Failure

 

 

Hopefully someone can shed some more light on what the cause & resolution is :)

 

Let me know when you want it scanned again to see what other DTC's comes back.

 

Cheers,

Jay

anma_big.txt

anma.txt

[Mirez]

:) Thats what its all about guys, helping each other out and appreciation- top men!

 

As for the fault, the lateral sensor basically measures the sideways motion of the vehicle and compares it to the expected motion in relation to the steering wheel position/speed. You normally get the old "implausible signal" code when its goosed, the "electric circuit failure" would indicate it can't communicate correctly - good and bad news, the connector has been known to come loose going into the module which will cause that code, the bad news is that I believe the sensor is down in the storage bay below the passenger seat, yes the area thats prone to flooding which would also cause that code.