Ok, take the thermostat out, and put it in a pot with some cold water, and a candy thermomiter (a regular one will break), put the pot on the stove and turn it on medium, watch the thermostat and temp. it should open up when the temp gets higher. The temp all depends on what Degree thermostat you have, some open at different tempuratures, I think you might have goten the wrong thermostat...