CBSE Class 11-science Answered

Normally the compressor of a refrigerator operates only for part of the time because the thermostat switches off the compressor when a set temperature is reached. But when the door of the refrigerator is kept open, the compressor will work all the time as the heat in the room is too large and the temperature never reaches the cut off point of the thermostatic switch. So, more heat is released into the room than what is absorbed. The compressor will also eventually burn up. If the ventilation is insufficient this will cause the room to warm up. This is because the radiator of the refrigerator releases heat into the room.