How to Test a Heater's Blower Resistor?

Answer In a car heater, the blower resistor controls the air that comes out from the blower. The blower resistor is an electrical connection to the blower motor that is usually located in the passenger si... Read More »

Top Q&A For: How to Test a Heater's Blower Resistor

How to Fix a Blower Resistor?

A malfunctioning blower resistor will cause inadequate airflow through the internal heat and air system. The fan inside the blower may only function periodically, it may only work on one setting, u... Read More »

How to Fix a Blower Motor Resistor?

When the resistor that regulates your blower motor's speed fails, the fan will either not function at all, or will run at one speed regardless of what the climate control fan knob is turned to. Blo... Read More »

How to Repair a Blower Resistor?

The blower resistor governs the speeds for the fan. It has three springs on it -- for high, low, medium, and uses a combination for "in-between" speeds. Each of the springs is a different thickness... Read More »

How to Replace a BMW Blower Resistor?

If your BMW's heater or air conditioner fan won't turn on or only works on the "high" setting, the blower resistor is likely worn out. You can save some money and replace the resistor yourself usin... Read More »