Show All ItemsOur master bedroom is always either cold in the winter or hot in the summer. The fact that the builder messed up by installing just one register in the room and the room itself is right above the garage doesn't help either.Using a digital thermometer I was able to determine that the temperature of the air coming in was half thatof the hottest register in the house (obviously this is for the winter case), and the airflow was barely there.My solution was to install a booster fan.The process was not all that complicated and this job can be accomplished by anyone with some basic electrical skills and some tools you can buy at local dollar store.Was it worth it? The answer is YES. Can it be done better? Yes but not by much. I'm sure some people out there who are familiar with how a furnace works will be able to come up with a better way in regards to how to control the booster fan, like using a pressure switch or choose other outputs on the controller furnace board. In my case, I just went with what worked for me and what I feltwas safe from a functional point of view and liability point of view..

Step 1: The fan, the duct and what needs to happenShow All Items« PreviousNext »View All Steps DownloadHeating, ventilation, and air conditioning (HVAC) systems provide temperature-controlled airflow in buildings and cars. The HVAC system reduces air infiltration and maintains pressure relationships between spaces. Even if an HVAC system is providing adequate amounts of cooled or heated air, the system will not be effective if the air is not moved throughout the building. ac units for sale in arizonaThis buyer's guide provides an overview of how to know when an HVAC blower needs to be replaced and how to go about replacing the broken motor of the blower. ac unit fan motor not workingReplacing the motor includes removing the old motor, selecting an appropriate replacement, and installing the new motor. used air conditioner window units for sale

Replacement parts can be found at most home improvement stores and HVAC specialty dealerships. If one were to go online, then eBay has a vast selection of HVAC blower motors that can often be purchased at a great price. Before problems occur with an HVAC blower, there are a number of steps homeowners can take to maintain the blower and its motor. By taking these steps, people may be able to avoid a broken blower and keep the house's air at a temperate climate throughout the seasons. These steps are particularly important in cold weather climates and can be performed before every heating season. Clean fan blades can provide the HVAC blower with optimum efficiency. This simple step can remove dirt and dust from the fan blades to allow the blower to run without interruptions. An old toothbrush can be used to remove contaminates from the fan blades. Within the HVAC blower, there is a belt that connects the fan to the blower motor. Because this belt runs nearly continuously during heating season, it can suffer from wear and tear.

Inspect the belt for cracks or frayed edges. If there are significant cracks, the belt should be replaced before it snaps completely. All motors need a bit of lubrication to ensure smooth running. Most HVAC blower engines have oil ports found above the axles that are used to lubricate the inner bearings. A few drops of dedicated bearing oil can be applied to the bearings to provide lubrication. If a person suspects that there may be issues with an HVAC blower, there are several methods to determine what is causing the problem. The following issues may resolve problems before pursuing a replacement motor for the HVAC blower. Most HVAC motors have a reset button that can be tripped if the motor becomes overheated or the fan blades become plugged. To check if this is the problem, unplug the power and check to see if the fan blades spin freely. Push the reset button, and then restore the power to the HVAC system. While a tripped reset button can be a first sign of future problems, it may be simply that the blades were clogged.

A broken belt causes the motor to run, but the fan blades will not spin. If the belt has become broken from overuse, it is not hard to replace. Once a match has been found for the broken belt, the new belt can be installed by placing it on the motor pulley, and then turning the fan by hand as the belt is pressed onto the fan pulley. If the HVAC motor is becoming overheated, the reset button can be tripped. To determine the cause of the overheating, wire connections should be checked for tightness. The run capacitor may also be faulty and can be replaced. If everything else seems to be functioning properly, but the blower does not start or get to full speed, the blower may need to be replaced. The easiest way to find a replacement motor is by checking to see if there is an exact replacement. Most HVAC manufacturers can be contacted with the serial number off the old motor to determine if a replacement can be found. If there is no exact replacement, people can usually use a universal replacement.

The table below has the variables that a person should look for when assessing whether a universal replacement motor will work in their HVAC blower: 3.3, 5.0, 5.5, 6.5 inches 0.25, 0.33, 0.5, 0.75, 1.0 Generally includes more than one speed As one can see from the table, there are a number of variables to keep in mind when looking for a replacement motor. Removing the old motor is generally the hardest step of the process. The motor can be dirty and corrosion can make the pieces difficult to remove. Before starting the removal process, make sure to shut off the circuit breaker at the electrical panel. A noncontact circuit tester can be used on the motor's wiring to ensure that the electricity is off. The blower assembly is usually found behind the protective cover of the furnace. It looks like a small barrel on its side. There are usually three wires coming out of its housing. The following steps will ease the process considerably. It is a wise idea to either take a picture or write down the various motor wire colors and their connections.

This will save a great deal of time with the installation of the new motor. After documenting the wiring configuration, the wires can be disconnected. Newer furnaces will have wires connected to the furnace control board or spade connectors. Older furnaces will have a wiring control box with a relay and wire connectors. The bolt or nuts can be removed from the blower assembly. Usually, there are two fasteners at the front of the blower assembly. Once the fasteners have been removed, the blower assembly can be slid out of the furnace. The motor of the blower assembly can be removed. The set screw that attaches the wheel to the motor should be loosened initially. The motor mounting bolts that keep the motor attached to the housing can then be removed. The motor should be able to pulled out after the mounting bolts have been removed. The mounting bracket can be removed once the motor is out of the assembly. It is important to take note of the orientation of the motor in the bracket.

In some older furnaces, the mounting bracket is built into the furnace. If this is the case, a universal motor will not work. An exact replacement should be sought with an adapter kit. Installing the new motor should be as simple as reversing the steps of removing the old motor: install the mounting bracket, motor, and the fasteners. However, there are some things to keep in mind when putting the new motor in. Before the wheel is secured to the motor, the wheel should be centered in the housing. The rotation direction should be set properly. Motor leads that have gone unused should be isolated individually using wire nuts or electrical tape. The run capacitor can be replaced at the same time as the motor. Once the installation of the new motor is complete, normal operation should be checked. People should listen for noises and make sure that air is flowing out of the supply registers. Now that you know how to diagnose and fix a faulty HVAC blower, you can go to eBay and get some replacement parts.

To find HVAC blower motors on the site, you can simply go to any page, find the rectangular text box, and then type "HVAC blower motor." The more keywords in your search, the more precise your results will be. Added information can include the manufacturer, voltage, horsepower, and other variables mentioned above. If you are unsure how to spell a keyword, you can replace any unknown letters with an asterisk as a wild card. Before you make a purchase of a replacement blower motor for an HVAC system on eBay, it is a good idea to spend a few moments looking at the sellers' profile. On any product page, there will be seller information that includes the seller's username, his or her positive feedback rating, and whether or not the seller is deemed top-rated by eBay. If you click on the username, you will be given more information, including the latest feedback on previous sales and five-star scale ratings for item description, communication, and shipping fees and timeliness. Losing airflow from an HVAC system can expose a person to the outdoor elements.