There’s always a sense of fulfillment when completing a project yourself, but wiring a new condenser fan motor and run capacitor can be a bit tricky if you haven’t done it before. In this case, the HUM terminal has 120V when the motor is on HEAT, a separate circuit on the board takes care of the motor when A/C is used. Safety is always the highest priority. At half an amp per fan, you could hook up 24 fans in parallel! I have an 1988 Ford F-150 and cant figure out why my blower doesn't work. Where to hardwire ?? Reason: I have to agree with Lindquist. You’re going to wire the black lead to where the black lead on your previous condenser fan motor was wired to. When installed I had a FRESH AIRE B110412-75697 installed. You’re going to wire the black lead to where the black lead on your previous condenser fan motor was wired to. listed check valve between the blower and the jets to prevent water damage to the blower. Finally, you’re going to wire the brown lead to the opposite set of terminals on your new run capacitor than the common lead. Make sure the electrical supply to the condenser unit is disconnected before beginning any work. I have a comfortmaker 3.5 tonne and air handler. If you search for power supply, you will find many. Is this a problem!? Assuming you have line power coming into the unit, follow step 1. Yes it happened to me. A hot blower motor, which indicates an overheating problem, will require replacement. Blower motor is bad 2. This will likely be back to your contactor. Electrical Question: I am wiring a hood exhaust fan over the kitchen range cook top. But thermostats can also be used for home air circulation and filtration with the fan-only setting, helping to save on your energy bills. When a furnace blower motor gives out, heat for the entire home will stop working, except directly by the furnace itself. Trane XV-80 blower motor just makes thumping sounds like it wants to start, and bumps a little bit at each thump. See Diagrams 1 and 2. Your email address will not be published. the best way is to put a fuse in the line between the battery and toggle switch. i did that before. ? The blower fuse is 30 amps, and the blower probably doesn't draw more than 7 or 8 (guessing). A second person pulls from the opposite end with the fish tape tool. You can use a wire nut and electrical tape to tie it off. If still having a problem, then take the truck to an auto armature repair shop for further diagnostics. Think of the contactor almost as a gatekeeper – two legs of 115 volt electric supply need to flow through it in order for your system to function properly. Second, we need the blower motor on. How-To Get those AC’s Bumping with Ice-Cold Air Before the Heat Overwhelms... Aegis Shaft Grounding Rings Protect your Motors and Bearings, How-To Wire Condenser Fan Motors Properly in 3-Wire & 4-Wire Configurations. I just replaced the fan motor and capacitor, the original motor had 3 wires the new 4. A capacitor helps the motor run and gives it more torque. That wiring diagram in the second to last paragraph was EXTREMELY helpful! On a dual run capacitor, there are 3 terminals. The wiring diagram said to hook it up to the common lead on the capacitor. Put in a cable connector in the opening and insert 8” of the wire end of a grounded power cord that is eight to 10 feet long. It will give you AC. So with -60 winters coming up here in Fairbanks, AK. Use your multimeter to confirm the disconnection. While most original condenser fan motors only have three wires, it’s very common for replacement condenser fan motors to have four. The furnace uses the power directly to run the blower motor and also converts some of the current to low voltage for electronic controls and circuits. Well written! Problem may be that a motor, when starting up draws a lot more current for a 1/4-second or so as it's getting started.. then the current draw falls off quite a bit. Does anyone have a recommended blower motor? You’re going to wire the white lead back to the other leg of your contactor. This switch is controlled by the thermostat and closes to complete an electrical circuit when electricity needs to be supplied to your condenser fan motor and compressor. Finally, you’re going to wire the brown lead to where your previous brown lead was wired to. That brown/white connector will be waiting to plug onto the fan cap common. It's okay to buy a power supply that can source up to 12 amps at 12VDC. 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