Know What To Use When And Where, 2d Ed. Does that sound right for a 4 ton unit. Fan ran for few minutes, kicked off, back on then off again. Will replace the start cap tomorrow. Fan stays on until I turn off thermostat. The owner of this website, www. For example during the summer when it is hot and a unit is turned on it will at first blow cold air then after a short period it will stop and blow room temperature air.
Rust on the blades is bad and should be cleaned off gently with a brush. Replacing fan motor and getting new dual capacitor. Brown , and yellow come from the motor. But I couldn't figure out how. Everytime it starts up the compressor comes on for a couple seconds then turns off. Question: Can the high heat outside and the lack of ventilation cause the capacitor to overheat and burn out or it this just a coincidence? The ends of all these wires, including the black and white have just been cut off blunt, and of course there is no wiring diagram attached to the blower.
More pics would be good. . Motor Removal The motor itself is still fastened to the interior of the blower assembly. There are important reasons for this that can affect the comfort produced by the appliance. If the unit has two capacitors then one is the Run Capacitor and the other is the Start Capacitor. A secondary timing circuit that ensures that the capacitor is not permanently left in the start winding circuit 4.
Or does it even matter? The speeds will be as described by the others earlier in that the lower resistance will be higher speeds. It's not likely to have a positive, a negative or a ground; rather it likely has common, high-speed, and low-speed conductors with a frame ground. The unit works otherwise but just no cold air. Compresser stays running but fan motor stops. Replacing the Start Run Capacitor A new fan capacitor should always be installed when a new motor is installed. Or just call a contractor to sort it out for you if you're not comfortable doing this. I have a number from the inside panel where the wiring is located and I have some numbers off the motor below the fan compressor? Can I run it on 110? The capacitor will last longer if you use the 440 and it only is specified for 370.
Removing the set screw and the motor's mount screws will allow you to pull the motor itself from the blower assembly. Although this is not recommended it can be done in extreme cases were the wires are all but impossible to get through the unit. The third one will be the common terminal. There should be a schematic on the side of the new motor showing which color wire goes were. I don't understand the theory behind these wires. Detailed Electrical Wiring Diagrams and Pictures assist your Home Electrical Projects.
It's 120 volts completing a circuit with the motors white wire. Also, there is a capacitor with two terminals on it mounted on this unit. Try Airstar supply for an exact original design spec capacitor. C- Neutral wire will be connected to fan motor and compressor without goes through any switch. Each of these will need to be checked to be sure the fan motor is bad.
I guess it just took a few minutes. After getting my furnace blower motor replaced, it now runs only in the following scenarios: 1. One of its job is to start that fan moving. So I generally install a new cap for just the fan motor and wire it up like you did today. Special Offer: For a 5% discount on any number of copies of the Home Reference eBook purchased as a single order. Run and Start will be the 2 leads reading the highest to each other Common is the point at which the Run winding and Start winding connect, it is not a common winding it is a common point where the 2 windings meet.
However, it would be great if you could put a bit of time into formatting your answer; that would let visitors better understand the great info you're bringing here. A voltage reading should be observed, approaching zero. And in some cases Yellow is replaced by Orange as with the newer units. The text above explaining about capacitors was suggested by Mr. The Higher the resistance, The slower the speed.
I do not have any instructions, directions, or a schematic. Touching the furnace's components with the power on can cause electrocution. I agree, but we are talking about a condenser fan motor. The wire colors are black,white ,yellow,red and blue. Different speeds may be necessary to adjust airflow for the specific installation, or for different operating modes. Unfortunately, the diagram on the inside panel is un-readable. Buying a new motor Here is a label from a condensing fan motor.