It is an old Rheem RGAA-100C furnace, On the old motor the wires was: White, Brown, Red, Black and Blue. On the new Motor it has Brown, Brown/White, Black, Red, White, and Blue. I don't know how to wire it back. They do not make the old motor anymore, this motor was the replacement. Could you please help. On the circuit diagram on the motor says: [Blk (Hi) or Blue (Med) or Red (Low)] to Line. There should be a schematic printed on a sticker on the motor. Without knowing the make and model, or looking at the diagram. I'm guessing based on other motors. One common "standard" is as follows: White = grounded (neutral) (clockwise). Black = High speed. Blue = Medium speed (medium low). Red = Low speed. Brown = Run capacitor. Brown w/ white = Run capacitor. Yellow = Medium speed. Purple = Grounded (neutral) (anticlockwise). Optional wiring available on some motors. However, without the make and model, or the schematic, this is just a guess.

The two brown wires (Br and Br/Wh) should be connected to the capacitor. If you don't have one, you may need to install one. The brown wire from the old motor should have been connected to it, so try to remember where you removed the brown wire from. The white wire from the motor, should connect to the white wire in the junction box. This is L2/neutral, and completes the circuit. The remaining wires are for selecting the motor speed (Blk, Blue, Red), so you're going to have to figure out which speed you should be using. If you can remember which color wire was connected to the red wire in the junction box, that should be the same color wire to hook back up. Typically the blower is run at low speed when in heating mode, but that's no guarantee that your equipment was set up that way. I wasn't able to locate any documentation on your equipment, and without a schematic I can't be any more specific. If you could include a good photo of the schematic, I could show you where to make the connections.

You should be able to find a schematic in the manufacturer's documentation, or on the furnaces access panel.Browse other questions tagged hvac or ask your own question.A malfunctioning blower motor will stop the air flow from a home furnace. A home's furnace takes a lot of abuse during the cold wintry season; components such as the blower motor must be in constant motion while warming the house. Detached House For Sale In Milton OntarioOver time, the furnace blower motor can become internally worn from age and lack of lubrication, causing a major reduction in warm air movement through the home's ductwork. Outdoor Furniture Stores In Des Moines IowaReplacing the motor is a practical solution to an ailing furnace appliance. Best Cleaner For Dog Pee On Tile

Preparing the Furnace The blower motor is commonly hard-wired into the home's main electrical supply. As a result, you will need to shut off the circuit breaker at the electrical panel that supplies the furnace's power needs. Touching the furnace's components with the power on can cause electrocution. Once the power is turned off, you can use a noncontact circuit tester directly on the motor's wiring; pressing the tester against the wires will immediately tell you if the circuit is live or off. Only after you verify that there is no danger of shock should any work occur on the motor's assembly. Blower Assembly Removal The blower motor is typically hidden behind the furnace's protective outside cover; it resembles a small barrel on its side with three wires extending from its housing. After noting the motor's wire color connections to the furnace itself, you can cut or remove the wires from their connection point. Each manufacturer has a different wire connection strategy, so it may be necessary to consult the specific furnace manual for more information.

Two to four bolts may hold the blower assembly to the furnace's main body, depending on the model. Once you remove the bolts, you can easily slide the blower assembly from the furnace. Motor Removal The motor itself is still fastened to the interior of the blower assembly. If you locate the motor's wheel within the blower, you will see a set screw holding the wheel to the outside assembly. Removing the set screw and the motor's mount screws will allow you to pull the motor itself from the blower assembly. This motor component is the portion that must be replaced. Replacement Motor Information The new motor should be installed in the reverse order of the removal process. But you should verify that the new motor is compatible with the blower assembly by matching its specifications with the old motor. Horsepower, voltage, speed, rotation direction and motor diameter should be the same values for the new motor to work correctly. Once the new motor is installed within the blower assembly, the furnace can be powered on at the circuit breaker to verify that it runs normally.

References Master Plumber: How to Replace a Blower MotorHVAC for Beginners: Furnace Blower Replacement, A How To Guide Photo Credits Jupiterimages/Comstock/Getty Images Suggest a CorrectionShow 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.