I agree... Blower Motor Resistor. I've had to change it in 2 of my 3 cars when the blower fan started acting up (haven't had to change it in the Crossfire - yet.) Sometimes it will stick on high, sometimes only 1 or 2 speed settings will work. Sometimes it comes on and goes off intermittently. Sometimes the fan just fails to run all together. These resistors wear out over time because to adjust the speed of your blower motor they resist/restrict the power to the fan that causes it to run at speeds lower than High. If you bypass the resistor your fan will run on high constantly with no speed adjustment. So, when they act as a resistor they are converting electrical power fed into it into heat (which is why they have heat sinks on them with the sinks generally located inside the main air duct to cool them) and the power that isn't converted to heat is then passed on to the blower motor allowing it to run at speeds lower than High. You can actually almost burn yourself if you touch the heat sink on one that hasn't been allowed to cool down. Heat and electronics don't go well together - which is why they fail over time.