The blower motor resistor is an important part of a car’s climate control system, responsible for controlling the speed of the fan which distributes air throughout the cabin. The blower motor resistor is connected to the fan motor, and it helps to regulate the amount of current flowing through the fan, allowing it to slow down or speed up as needed. Knowing how hot a blower motor resistor should get is important for the proper functioning of the car’s climate control system.
How hot is a blower motor resistor supposed to get?
The temperature of the blower motor resistor can vary depending on how much electricity is passing through it, how much resistance the resistor is providing, and the amount of air passing through it. Generally, the blower motor resistor should not get too hot. If it does, it could be a sign of an electrical issue such as a short circuit or a bad connection. It is also possible for the resistor to overheat if it is not receiving proper airflow.
In order to measure the temperature of a blower motor resistor, an infrared thermometer can be used. This type of thermometer is able to measure the temperature of the resistor without touching it, allowing for a more accurate reading. The ideal temperature for a blower motor resistor is typically between 180 and 200 degrees Fahrenheit. If the temperature is higher than this, it is likely that there is an issue with the electrical system.
When a blower motor resistor is functioning correctly, it should not exceed 200 degrees Fahrenheit, even when the fan is running at its highest speed. If the temperature of the resistor is consistently higher than 200 degrees Fahrenheit, it is likely that there is a problem with the electrical system, and it should be inspected as soon as possible.
In some cases, the blower motor resistor may be designed to get hotter than 200 degrees Fahrenheit. This is usually the case with high-performance vehicles, as they require a higher temperature to achieve the desired fan speed. If this is the case, the manufacturer’s specifications should be consulted to determine the proper temperature range.
It is important to note that the blower motor resistor should not get too hot, as this could lead to electrical damage. If the fan is running at a high speed and the blower motor resistor is getting hotter than 200 degrees Fahrenheit, it is likely that there is an issue with the electrical system and it should be inspected as soon as possible.
If a blower motor resistor is consistently getting too hot, it is likely that the fan speed is too high, the resistor is not providing enough resistance, or the fan is not receiving enough airflow. In this case, the fan speed should be lowered and the resistor should be checked for proper functioning. If the fan speed is too low, the resistor may be providing too much resistance, which can also lead to overheating. In this case, the fan speed should be increased and the resistor should be checked for proper functioning.
Where is the resistor for blower in 93 740i?
The resistor for the blower in 1993 740i is located in the blower motor housing, which is found in the passenger side footwell. To access the resistor, you will need to remove the glove box and the blower motor housing. The resistor is a small, rectangular box that is typically located near the top of the blower motor.
Once the resistor is exposed, you can remove it by disconnecting the electrical connector and unscrewing the mounting screws. Care should be taken when removing the resistor, as it is delicate and may break if handled too roughly. You may also need to clean the resistor with a soft cloth before installation, as it may have accumulated dirt and dust over the years.
What causes blower resistor to burn up?
Blower resistor burnup is caused by an electrical overload on the resistor. It can be caused by a faulty blower motor, faulty wiring, or a bad resistor. When the current running through the resistor is too high, it causes the resistor to burn up, which in turn leads to poor blower performance and can even cause a fire.
How hot will a 5w resistor get?
A 5W resistor will get quite hot. Its temperature will depend on its environment and the wattage it is dissipating, but it is likely to reach temperatures of up to 100°C in still air. It is important to ensure adequate airflow and cooling measures are used when using 5W resistors.
How fast do resistors heat up?
Resistors heat up relatively quickly depending on the wattage rating and the amount of current that is flowing through them. Generally, small-value resistors will heat up faster than large-value resistors as they are designed to handle less current. Heat can also build up quickly in resistors if they are not properly ventilated.
How do I choose a resistor wattage?
Choose a resistor wattage based on the amount of power it will be dissipating. Consider the maximum current and voltage it will need to handle and calculate the power with the formula P = I*V. Choose a wattage rating that is at least 1.5x the calculated power.
What causes blower resistor to burn up?
The most common cause of a blower resistor burning up is a failing blower motor. When the motor is failing, it will draw too much current, causing the resistor to overheat and eventually burn up. Other causes could include a faulty wiring connection, a bad resistor, or an electrical short.
How hot is a blower motor resistor supposed to get? – Summary.
In summary, the blower motor resistor should not get too hot. If it does, it is likely that there is an issue with the electrical system. The ideal temperature range is typically between 180 and 200 degrees Fahrenheit, although it can vary depending on the car’s make and model. If the blower motor resistor is consistently getting too hot, it is important to check the fan speed, the resistance provided by the resistor, and the airflow to the fan.