The temperature difference between one side and the other is caused by plicho junctions. Is this true? This is the temperature they cool off at. If they are 60 degrees C on the hot side, and 40 degrees C on the cold side, it is working. Even though both sides are above room temperature, that doesn't mean anything.
Let's Get It Fixed!
HomeX virtual experts will assess your issue (for free!) and can resolve simple problems.