How can i test my blower motor

Start car and see if blower motor works. If fuse blows again, check for loose circuits. If the circuits are in good repair but the blower motor keeps blowing fuses, replace the blower motor [source: You Fix Cars ].

Disconnect car battery. Detach the blower motor from its connector. Unscrew all the screws on the blower motor. Place them in small container.

Locate the retainer clip in the center of the blower wheel. Disconnect it from the motor shaft and set aside. While replacement is easy, the exact location of your blower motor fuse may vary from vehicle to vehicle. Examine the exposed components in the furnace cabinet to locate the blower motor; look for a small silver box positioned toward the top of the cabinet.

Mounted just above this box you should see a small round component with a raised red or white button at the center; this is the blower reset switch.

There are a number of things that can go wrong with your heating system, but if the air stops blowing altogether and the same is true on cold air settings, a blower motor replacement is likely in order. Connect a test light or multimeter to the ground black lead. Turn the ignition key to the on position engine off , and remove the relay. Using the probe, test all terminal sockets in the relay connector. Two of the four should have power.

In some cars, a failed blower motor resistor can cause a heater fan to stop working completely. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location. Related repairs may also be needed. Most car manufacturers use a series of resistors to make the heater blower motor run at different speeds.

The resistor module is easy and inexpensive to replace. Your blower motor forces the warm air out of your furnace and through the air ducts in your home. The blower motor needs routine lubrication, and often a specific kind of lubrication to upkeep performance and function over time. Otherwise, the fan might seize up and cause a loud noise and an even louder repair bill. You might also hear ongoing whirring noises, or noises that change or get louder if you increase the fan speed.

These are all signs of problems with the blower motor. Turn the ignition to run, test the connector with your multimeter on the DC scale.

Check the HBAC 15 amp fuse with your multimeter. If all things work the most likely you need to change the relay. Once you have checked or replaced anything that wasn't working, it should be working just like brand new! Want to master Microsoft Excel and take your work-from-home job prospects to the next level? Jump-start your career with our Premium A-to-Z Microsoft Excel Training Bundle from the new Gadget Hacks Shop and get lifetime access to more than 40 hours of Basic to Advanced instruction on functions, formula, tools, and more.

So what causes blower motor failure in the first place? Well, motor burn-out is the only real cause of blower motor failure. In every home or vehicle, an HVAC system is a must-have.

With changing seasons, from summer to winter, an HVAC system is the most depended on the device. In every HVAC system, there is a component known as a blower motor. This blower motor is responsible for blowing heated air through your vents when the heating system is on. The motor is also responsible for blowing cold air through your vents. With the need to maintain comfortable temperatures within your home or vehicle, the HVAC is a vital component to have.

When the temperature falls below your thermostat setting, it sends signals to the furnace, which in turn starts to work. The furnace works by creating cold or hot air, which circulates to various rooms in your home. The blower is responsible for circulating the cold or hot air created by the furnace throughout your house to ensure your temperature reaches the thermostat.

The blow motor makes this possible by spinning a fan. The fan, in turn, blows the cold or heated air through your ventilation system. The small-sized blower motor can move large air volumes. Between the single speed and the variable-speed motors, the best type of blow motor preferred is the variable-speed motor. The single-speed motor always resorts to cold sports as it only works when signaled by the thermostat.