Heater not getting very hot

[OllieB2000]

I had an issue where my coolant temp wasn't getting up to temperature and the heaters weren't getting hot at all either. Since then I replaced the inline thermostat (the one above the DSG box) which fixed the coolant temp issue so the needle now gets to 90. However although my heaters get warmer now, they dont't sem to get nice and hot even after the coolant is up to temp.

I've scanned the car and found the following codes which may be related, however I have no idea how or where to check this:

Address 08: Auto HVAC (J255) Labels:| 5K0-907-044.clb
Part No SW: 3AA 907 044 AG HW: 3AA 907 044 AG
Component: Climatronic H03 0303
Revision: 00001K02
Coding: 0010004002
Shop #: WSC 00020 999 00000
ASAM Dataset: EV_Climatronic A01010
ROD: EV_ClimaAutoBasis_VW36.rod
VCID: 75A21320D4F24FE784-8020

2 Faults Found:
9473137 - Motor for Left Temperature Flap
B108C 71 [008] - Actuator stuck
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 2
Reset counter: 83
Mileage: 123574 km
Date: 2019.12.10
Time: 08:31:44

9473393 - Motor for Right Temperature Flap
B108D 71 [008] - Actuator stuck
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Reset counter: 82
Mileage: 123813 km
Date: 2019.12.14
Time: 17:40:16


Anyone encountered this before or could point me in a direction to diagnose this further?