Old Radiator Overheating: How to Adjust Temperature with Broken Knob in Rented Apartment

Hello,
I am renting an apartment and it's my first winter in it
I have an old radiator in it that is still heating to the maximum (included in the rent, so it's not about cash) and it's too hot because it is about 25'C.
Unfortunately, it has a broken knob
What to do to screw the radiator? I don't want to rummage because it will flood the apartment, so I'd rather ask.

Regards

Use pliers to grab this protruding pin and turn it clockwise.

Nothing by force!!! These valves like to break and leak, especially when actuated by force after many years of non-use. In principle, they are not used to regulate, but to turn off the inflow to the radiator. The photo does not show the knob. If it is missing, try to turn the valve spindle with pliers or an adjustable wrench, but do not tighten. If there is a leak, put the bowl underneath the gland, unscrew the gland's cap nut, pull out the gland with pliers, push a twine made of hemp tightly saturated with thread paste or grease - with a thread, push the gland in and tighten the cap nut. The leak should then stop. I know from practice the lack of regulation - the room temperature is always high.

I turned the protruding 'pin' as much as possible, but the radiator continues to heat the same, and as @zbi_gniew Rusek advises, I do not want anything by force - not my apartment and it is a pity to break something in the middle of winter.

Probably the replacement of the entire valve now in winter, if I have no way to turn off the water (I would probably have to have the entire riser) out of the question?

PS no knob.

PS2, if I unscrew the cap nut of the gland and pull out the gland with pliers (the gland is the protruding pin ??), water will not start to flow strongly from the radiator?

lelek_m wrote:

I turned the protruding 'pin' to the maximum, but the radiator continues to heat the same

This heater will not cool down immediately. Wait some time and check the temperature of the radiator, maybe the valve has just been closed.

as this is a studio apartment, it is the ONLY radiator in this apartment - so my question: can I SCREW it to heat less or will I just turn this valve off?

Here the topic was discussed https://www.elektroda.pl/rtvforum/topic2724183.html

Thank you for your help, topic to close!