2020 Combo, internal heater only works on maximum setting

2020 Vauxhall Combo 1.5
Car: Vauxhall Combo
Year: 2020
Variant: 1.5
Categories: Electrics, ECU, Warnings & Lights
Just purchased a used Vauxhall Combo Sportif, the heating dial only work at MAX, marked 30 degrees, if turned down a comfortable 21 degrees (mid setting on dial) it blow COLD AIR, so you get toasted or frozen, no in between.
Any clues where to start with this one.
Also outside air temperature showing 74 degrees C ! But I think I’ve found the answer to this one on here, also mentioned that it doesn’t affect internal heater.
Problem added: Jan 27, 2024 (1 month ago)
Check your owners h/ book with regard to settings , all makes are different and sometimes have quirks that can affect this . If you dont have manual you can download here

https://www.vauxhall.co.uk/owners/information-and-safety/owners-manuals.html
Answered Jan 27, 2024 (1 month ago)
Replying to post by whittingehame:
Check your owners h/ book with regard to settings , all makes are different and sometimes have quirks that can affect this . If you dont have manual you can download here

https://www.vauxhall.co.uk/owners/information-and-safety/owners-manuals.html
Thanks, but I have tried all sorts , there are only two knobs, one for the fan speed, the other for the temperature, I can’t see what else would affect it, the outside air temperature is showing (varies) between 64 & 70+ degrees C, but so I’ve discovered on google this has no bearing on the internal heating
Answered Jan 27, 2024 (1 month ago)
I ' m almost sure on some other makes we had in for similar fault that the outside air temperature did affect it and was the cause . But could be wrong , it was left to my auto electricians to solve / fix and I didn't really bother get too involved .
Answered Jan 27, 2024 (1 month ago)

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