RV AC, how to wire fan (blower) motor to capacitor.
Need wiring instructions for capacitor to the ac fan motor. Previous owner straight wired to avoid replacing a bad part, now I don't know how to rewire the Fan correctly.
Fan has three speed but I only use two for the AC. Fan wires, White and Brown Power, Red Low, Yellow Medium, Black High: the capacitor has Power supply, HERM (compressor) has three posts, and Fan only has two connectors.
I think the Brown fan wire should be wired with Herm, so it only runs when the AC is running, and the Red / Black (Low/High) should be conected to Fan terminals. Help, it's getting hot here.
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Re: RV AC, how to wire fan (blower) motor to capacitor.
You almost have it Look closer at the run capacitor. It has Herm, this is for the compressor, Com or C and F or Fan.
1 of your power wires is the fan speed so connect them accordingly usually black is hi, blue med, & red is low. You are "feeding" voltage to the selector switch on 1 side and coming out to the fan motor speeds.
Next you have a "Common" wire on your fan motor (this means its Common to all the other connections inside the fan motor to me. It is usually white. Connect this to the other line of power usually the Com on the capacitor unless it connects to a strip on the selector switch. But 1 of these 2 places will be the other side of your Power when plugged in. Lastly the brown it is usually the fan capicator only wire and it will connect to the fan "F" terminal on the capicator this terminal will not have any other wires connected to it.
This should make you a happy camper. Please rate me accordingly and good luck.
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An open limit switch may make the fan run all the time. Try disconnecting the Green wire @ the furnace...if that does the trick, then either the thermostat fan relay is stuck, or there is a short between the Red & Green wires somewhere in the thermostat wire.
ITS CALLED SURGERY take picture as ya go and have a big bucket for screws. make sure you have your motor and capacitor tested first before you replace it unless you know its bad (hp,sf &rpm must match !!!! on new motor ) little guys are real expensive and are a three speed motor and must be hooked up right or you will burn it UP !
do this in the shade cuz it aint no fun in the hot sun(me Florida) the first thing i would do is oil the motor then have the capacitor checked , the motor may not need to be replaced just serviced ?.. hay now if'n i was any help write a review of thanks or just VOTE,, MOTORWIZJ ..FL
My sheet shows part # 3100248.420 as fan run capacitor.You may have an updated number. Check voltage outputs labeled on it are same as on old one, and double check wiring is correct, to and from capacitor. Be careful not to mistake compressor start capacitor as well. By sounds of number, it's probably the right one.
The two brown wires go to the fans capacitor. The capacitor should always be changed with the fan motor.
It sounds like your unit has a dual capacitor. One side for the fan and the other for the compressor. All you will be doing (After rewiring the compressor wires as they were originally.) is abandoning the fan side of the capacitor, and wiring your new capacitor to the brown and brown with stripe wires. It does not matter which terminals the brown wires go on.
sounds as if your blower motor in high speed has the windings going out. You need to check to see what the amps the motor is pulling to see if the blower motor is going out. It is also possible theat you may just need a blower motor capacitor. To check the amps you need an amp meter and taking the black wire coming from the motor and place the amp clip around this wire and start the a/c this will give you the amp pull and compare this with the amps the motor is specified for. If the amp being pulled is higher than what the motor is designed for then the motor is going out and not giving you the proper rpms in order for the unit to operate effeciently. Also to check for the capacitor you'll need a capacitor meter and follow the instructions. I would check the capacitor first before the motor in the event the capacitor is bad it will not all the motor to achieve the proper rpms.. Also it is easier to change out than a motor. Good Luck
fan motor is possiblely bad but start with the capistors in the run box on the roof remove cover you will see where all the wires go onto a metal or plastic box depending on age of unit remove acess cover peek inside and see if you see a exploded capistor ie: i see smoke comming out of my ac capsitor are easy to change but they can kill you they store a lot of energy and are dangerous if you are not careful with them