Question

kamra garam ho jayega

There will be a drop in the room temperature but if the room is well ventilated the air will conduct and distribute the heat Therefore drop will is small and negilible after sometime.

From wiki:::
The fridge with the door left open will run pretty much continuously to try to cool the inside. Our fridge doesn't know the door is open, so it keeps running. The thermostat inside never senses that the inside has cooled, so it tells the compressor to stay on. The room will be cooled by the fridge, but remember that the compressor dumps heat out into the room all the while that it's running. And because the fridge is not 100% efficient, there will be more heat generated than there will be cooling. The result? The room will eventually warm up.