L322 V8 4.4 2003 Vogue - A/C right side vents overheats erratically

Hello,

Small issue with my L322 when I turn the heater A/C on, from time to time, the front right central vent and the front right passenger vent will stop blowing a nice cold air, but instead push a extremely hot air.
This situation only happens on right vents, nothing similar on the driver side, vents keep pushing a cool air.

Could it be the "infamous hedgehog" Final Stage Resistor losing its head? how can the A/C heater fails on one side and not the other?

Your expertise are welcomed.

Wishing you a happy new year

Hedgehog only controls fan speed so unlikely to be that.
@Saint.V8 did a post I think about the heater assembly.
I suspect its a flap moving incorrectly for some reason.

Thanks, it is a good lead to follow indeed.
I found a scheme https://e2e.ti.com/blogs_/b/behind_...d-what-drives-them-in-automotive-hvac-systems
The flap actuator that mix air between the heat exchanger and the evaporator might stuck itself.
I wonder if I can access this piece ?

I've tagged Saint as I'm sure he's had the heater box out so will probably be able to give more help than me.
You could also use the forum search to find the post. Search for his name with the word heater or something and you should be able to find it.

You need to change this I had exactly the same issue
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.co.uk/ulk/itm/332356783074

Ahhh..... The jag controlled all it's heating by regulating water flow, didn't realise the L323 had valves too.

Thanks biketeacherdave
I order the piece right now. No specific difficulties I should worry about?

No it's an easy swop out you lose a bit of coolant so pour some down the hoses before you reconnect them bleed it all up job done.
There is small pump connected to it as well that can pack up sometimes.

thanks again, I am waiting for my package. Once it is there I keep you posted on my progress.