Chevrolet Corsa heating

I have a Corsa Clasic Year 95.
Although I put the cold heating selector, it still radiates heat in the feet zone (where the heating radiator is). Comprobe that the selector only redirects the air passage through the radiator or not; but does not have a valve that cuts the circulation of hot water through the heating radiator. Is this so?
Thanks for any answer

In all the corsa the water circulation valve you have in the engine, under the multiple of admission, it is quite uncomfortable to change it, I advise you to take it to the workshop, you will save time and bad blood !!! Any questions

Hi Mario, it is as the companion Elferchu is very complicated to change the valve, although nothing is impossible, it is very good advice to take it to a good workshop, greetings.