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Old 01-31-2019, 06:12 AM   #1
Scud
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Heating problems on GT Sport

My heating on the car takes forever to get warm. Even before this cold weather it took about 15-20 mins to get slightly warm. Any ideas what it is and what can be changed to make it better?
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Old 01-31-2019, 06:32 AM   #2
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Engine thermostat
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Old 01-31-2019, 02:14 PM   #3
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Originally Posted by vwengineer View Post
Engine thermostat
Easy enough to fix yourself? I.e. get access too as well. The dial on the dash warms up normal but the heating in the car takes forever
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Old 01-31-2019, 03:32 PM   #4
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Does this car not have an electrical auxiliary air heater seeing its a TDI. May want to Vcds this vehicle to confirm and pull DTC if any.
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Old 01-31-2019, 05:12 PM   #5
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Does this car not have an electrical auxiliary air heater seeing its a TDI. May want to Vcds this vehicle to confirm and pull DTC if any.
I don't have any codes showing for this problem.
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Old 01-31-2019, 06:44 PM   #6
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I don't have any codes showing for this problem.
What did you scan with a generic scan tool?
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Old 01-31-2019, 07:06 PM   #7
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What did you scan with a generic scan tool?
Yeah just my usual, torque obd checker. Think I need the proper tool on it to show it?
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Old 01-31-2019, 08:03 PM   #8
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I believe you will need something else to check that.
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Old 02-01-2019, 05:18 AM   #9
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Yes, a generic ODB scanner will only show engine codes, if it's the auxiliary heater the fault is stored in the HVAC control module, you need VCDS/ODB11 to read that. So you mean your engine gets at temperature but it still blows cold air? Did you check the coolant level (if the coolant is low, the heater core is generally the first to get empty).
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Old 02-01-2019, 11:51 AM   #10
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Originally Posted by vwengineer View Post
Yes, a generic ODB scanner will only show engine codes, if it's the auxiliary heater the fault is stored in the HVAC control module, you need VCDS/ODB11 to read that. So you mean your engine gets at temperature but it still blows cold air? Did you check the coolant level (if the coolant is low, the heater core is generally the first to get empty).
I have a bluetooth obd11 reader that scans to the app on my car, whether that should work or not I'm not too sure.

Yeah that's what I mean, I will check the coolant now. I haven't checked anything as I wasnt sure what to do. Still learning stuff on my car. Never had this problem before.
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Old 02-01-2019, 12:22 PM   #11
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Originally Posted by vwengineer View Post
Yes, a generic ODB scanner will only show engine codes, if it's the auxiliary heater the fault is stored in the HVAC control module, you need VCDS/ODB11 to read that. So you mean your engine gets at temperature but it still blows cold air? Did you check the coolant level (if the coolant is low, the heater core is generally the first to get empty).
The coolant level was on minimum so topped it up. Hopefully that will sort it, will try it tomorrow.

Thanks
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Old 02-01-2019, 12:37 PM   #12
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I meant ODB Eleven, it's different than ODB-II. If there was still coolant in the tank it's probably not the problem unfortunately.
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Old 02-01-2019, 01:45 PM   #13
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If you had no coolant in tank or low coolant you would have gotten a warning for that in the cluster.
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Old 02-01-2019, 02:41 PM   #14
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The GTI has the level sensor but I'm pretty sure that not all engines get it. At least some newer/small TSI don't have it
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Old 02-01-2019, 03:04 PM   #15
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MKV TDI have a G32 sensor. VW has been using coolant level sensor for years.
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Old 02-01-2019, 04:06 PM   #16
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MKV TDI have a G32 sensor. VW has been using coolant level sensor for years.
I could see the prongs in the tank, obviously I think that's when it is almost all gone as the prongs were still in the fluid but at minimum level. I'll see if it solves the problem first.

Will a proper diagnostic computer find the fault?
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Old 02-01-2019, 04:48 PM   #17
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A proper scan tool will find whatever faults you have and they may lead you to your heating issues.
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