high quality heater resistance / control module repair car break heat.The blower motor consists of a set of terminals for generating voltage proportional to the current. These resistors allow blower motors to operate at lower speeds. If the blower motor resistance fails, the blower motor will only play maximum speed and cannot slow , meaning it will only work at full speed. Changing the blower motor resistance can usually this problem.Installation instruction:However as this is a service part we recommend installation by a qualified professional. When installed it is IMPERATIVE to monitor the temperature of the resistor on first . Sometimes a blown resistor can be a symptom of the problem and not the problem itself, and replacing it in this scenario will only it to blow again. If the resistor starts heating very quickly and getting too hot IMMEDIATELY SWITCH OFF YOUR CAR and diagnose the problem elsewhere. Resistors usually blow when they get too hot and this happens when too much current is being drawn from then. This can happen if there is an issue with the blower motor or even the ignition system, or a fault with the wiring. Also please check your fan is not jamming because of dirt or grease build up, or a failure in the bearings. This will also the fan to try to draw more in an attempt to spin, causing the resistor to overheat and fail. If replacing the resistor (and it is not getting hot) your heater still does not work, please check the thermo fuse or carry out further diagnosis elsewhere for a fault. Interchangeable Part Numbers: : 6441.L2 509355 36695T1000948E/A F657165W/M F657165W/RColour:black+silver+greenMaterial:Plastic + MetalPackage Contents:1 * Blower Fan ResistorOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.