Heating Issue - Help needed

[bigchow]

Hi Guys,

I have a 2020 Taycan Turbo with a heating issue. When the heaters are switched on there is only hot air circulating on the passenger side and cold air on the driver side.
I've tried putting the heating on max and then dropping to the coldest the but no prevail. There is no fault codes on the dash and not sure how to get this fIxed. I called porsche dealership as I heard there was a common issue with the HVAC system on models from 2020. They tod me that they ill inspect the car and if it the HVAC system then the will replace it for free but if its not then I will have to pay them £250+ VAT for diagnostics. I dont think this is a HVAC issue as I still get hot on one side.

has anyone else had this issue? any knowledge and advice would be much appreciated

Thanks.

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[gnr3312]

It really sounds like the heater has died, a common problem that could be replaced under warranty. If you do a search for “heater” and check the “only search in title” box you’ll see how many have mentioned this happening to them. Have you ever done any work on it before?

 

[MrJones02]

Check if your front fans are running, if I'm not mistaken the one on the UK drivers' side needs to blow some hot air into the wheel-arch. (turn your front wheels all the way to the left so you can check if the fan is spinning freely).

I had the same issue a while ago, right fan was blocked with dried up dirt
After clearing it and making sure the fan could spin, hot air was back on that side. (euro-spec, so passenger was feeling cold air)
Don't leave it on "auto", set it to full blast to test

Hope it's the same quick fix for you, worth a shot.

 

[Taycan4S_UK]

Do you have Porsche warranty ? If yes, it’s all covered.

if no (guessing this is the case) and that’s why they want to charge you diagnostic fee.

 

[r553]

I've had a similar issue. It turned out to be servo motor inside the heater assembly in the dashboard. The dashboard has to come out to perform the repair. Porsche extended the warranty on these servo motors in the US. Good luck.

 

[Bennachie]

Almost certainly 'the servo motor problem' which is why one side works hot and the other not. Not the high voltage heater as hot air is being blown...

 

[prj]

Hi Guys,

I have a 2020 Taycan Turbo with a heating issue. When the heaters are switched on there is only hot air circulating on the passenger side and cold air on the driver side.
I've tried putting the heating on max and then dropping to the coldest the but no prevail. There is no fault codes on the dash and not sure how to get this fIxed. I called porsche dealership as I heard there was a common issue with the HVAC system on models from 2020. They tod me that they ill inspect the car and if it the HVAC system then the will replace it for free but if its not then I will have to pay them £250+ VAT for diagnostics. I dont think this is a HVAC issue as I still get hot on one side.

has anyone else had this issue? any knowledge and advice would be much appreciated

Thanks.

You could use MapEV diag to pull the codes, would have cost you all of $10.
The thing is though, it sounds like you wouldn't have been able to fix it anyway yourself and would have paid someone to do so.

Or did you want to take the dash apart yourself to get to the servomotors? If so then MapEV Diag will show you which one is bad. If not, then just bring it to whoever is going to work on it.

 

[bigchow]

You could use MapEV diag to pull the codes, would have cost you all of $10.
The thing is though, it sounds like you wouldn't have been able to fix it anyway yourself and would have paid someone to do so.

Or did you want to take the dash apart yourself to get to the servomotors? If so then MapEV Diag will show you which one is bad. If not, then just bring it to whoever is going to work on it.

I tried MapEV and The faut codes that I got were U045600 Invalid Data Received From Coolant Temperature Control Module. Has anyone else had this before?

Also got two further faults for the From active air grilles but I recently had the replaced with my bumper and Doubt they would cause loss of heating on driver side cabin.

 

[prj]

I tried MapEV and The faut codes that I got were U045600 Invalid Data Received From Coolant Temperature Control Module. Has anyone else had this before?

Also got two further faults for the From active air grilles but I recently had the replaced with my bumper and Doubt they would cause loss of heating on driver side cabin.

Post the entire scan as a text file, you're probably missing something. Unless of course you cleared the faults, in which case you will have to wait a bit for it to show up again.

 

[bigchow]

Post the entire scan as a text file, you're probably missing something. Unless of course you cleared the faults, in which case you will have to wait a bit for it to show up again.

I scanned it and cleared the codes but the following codes still appear:

System name: 03 - Brakes 1
Workshop ID: J104
Software number: 9J1614095S
Software version: 0190
Hardware number: 9J1614095M
Hardware version: H07
ASAM ID: EV_ESP9BOSCHPO513
ASAM version: 002
FAZIT: BPA-08520.08.2000099950
VIN: WP0ZZZY1ZLSA69014

1 DTC entry:

12845418 Invalid Data Received From Coolant Temperature Control Module
U045600 active
00101111 active in this driving cycle
active at least once in current or last driving cycle
confirmed
active at least once since DTC's cleared
MIL off


System name: C5 - Thermal Management
Workshop ID: J1024
Software number: 4KE965429M
Software version: 0325
Hardware number: 4KE965429
Hardware version: H08
ASAM ID: EV_ThermContrVISAU49X
ASAM version: 002
FAZIT: ASY-SC114.08.2020188972
VIN:

2 DTC entries:

37187 Lost Communication With Active Grille Air Shutter Module "A"
U028400 active
00101111 active in this driving cycle
active at least once in current or last driving cycle
confirmed
active at least once since DTC's cleared
MIL off

59316 Lost Communication With Active Grille Air Shutter Module "B"
U028500 active
00101111 active in this driving cycle
active at least once in current or last driving cycle
confirmed
active at least once since DTC's cleared
MIL off

 

[prj]

Since you cleared them the fault may not show up immediately, now you have to drive it for a while and scan again.

 

[bigchow]

It's persistent. I cleared the faults few weeks ago and it still appears. and then tried again and still have the same heating issue.

 

[prj]

It's persistent. I cleared the faults few weeks ago and it still appears. and then tried again and still have the same heating issue.

Your entire logic of clearing faults repeatedly and then assuming only the ones that show up immediately are active is flawed.

Stop using the clear button and drive the car for a few days. The servomotor codes are not instant in many cases, it takes a while. So if you keep clearing the faults over and over then you'll never get the chance to see what is actually causing the issue.

Also scan can be saved to text file and uploaded. Just FYI.

 

[bigchow]

scanned today,
thanks

 

[prj]

Heat pump is not filled and two servo motor faults... it's quite clear no?

System name:         08 - Air Conditioning
Workshop ID:         J301
Software number:     9J1907040K
Software version:    1160
Hardware number:     9J1907040A
Hardware version:    H52
ASAM ID:             EV_ACClimaBHTCPO513
ASAM version:        005
FAZIT:               BHB-00117.08.2002251126
VIN:                 

2 DTC entries:

             8236    Right temperature flap positioning motor
          B108D09    Component malfunction
         00001000    not active
                     confirmed
                     MIL off

             8241    Left temperature flap positioning motor
          B108C09    Component malfunction
         00001000    not active
                     confirmed
                     MIL off

And:

System name:         C5 - Thermal Management
Workshop ID:         J1024
Software number:     4KE965429M
Software version:    0325
Hardware number:     4KE965429
Hardware version:    H08
ASAM ID:             EV_ThermContrVISAU49X
ASAM version:        002
FAZIT:               ASY-SC114.08.2020188972
VIN:                 

4 DTC entries:

            37187    Lost Communication With Active Grille Air Shutter Module "A"
          U028400    active
         00101111    active in this driving cycle
                     active at least once in current or last driving cycle
                     confirmed
                     active at least once since DTC's cleared
                     MIL off

            59316    Lost Communication With Active Grille Air Shutter Module "B"
          U028500    active
         00101111    active in this driving cycle
                     active at least once in current or last driving cycle
                     confirmed
                     active at least once since DTC's cleared
                     MIL off

            60009    Refrigerant pressure for heating of passenger compartment
          B16A384    Signal too low
         01101101    active
                     active at least once in current or last driving cycle
                     confirmed
                     active at least once since DTC's cleared
                     not yet tested in this driving cycle
                     MIL off

            60001    Refrigerant pressure for cooling passenger compartment
          B16A284    Signal too low
         01101101    active
                     active at least once in current or last driving cycle
                     confirmed
                     active at least once since DTC's cleared
                     not yet tested in this driving cycle
                     MIL off

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