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Original message
| jaaman
 |  "replacing condenser fan motor"
, posted Sat 10 May 10:01:  
I have a Ruud Acheiver 10 High Efficiency air conditioning unit. I've been watching the condenser motor go out gradually.. loud when operating, kicks on and off with a thud. Finally it just stopped working. Upon inspection I see the internal lubricant leaked out and looks burnt, indicating that it probably overheated. It was recommended that I replace the motor and condenser. This doesn't appear to be a difficult job, but I have no experience with high voltage and condensers. I just want to make sure that I am safe when taking this on. Is it only necessary to cut the main power when working on this, or do you recommend any other safety precautions? Or any other advice would be appreciated. Thank you!
[this message was edited by jaaman on Sat 10 May 10:03] |
| Replies:
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| Houston204
| "Re(1):replacing condenser fan motor" , posted Sat 10 May 13:04:
If your fan spins freely when power is removed, you may only need a capacitor.
Otherwise...
Locate and purchase your replacement motor with a new capacitor, wire nuts and wire "zip" ties. I recommend and OEM motor. If you cannot get an OEM, you might remove your old motor and take it with you to purchase a new one. Verify Horsepower, RPM, Voltage, Rotation, and Frame. If your old motor mounts to the condenser in any way other than the bolts at the end opposite the shaft, you will have more difficulty locating a new motor.
Turn off power to your condenser.
Wait a few minutes for the capacitors to bleed down.
Write down the current wire connections from your fan motor to the contactor and capacitor.
Example...
Remove your old fan motor from the condenser.
It is likely that your old cap was a dual cap. If this is the case, leave the wires connected to Herm and the C that went to your contactor. (Only removing the 2 fan wires from the dual capacitor)
Sand and lubricate the shaft of your old motor.
Hold the shaft with an adjustable cresent wrench and spin off the blade.
Install the new motor and NEW capacitor.
Install the blade. It should be close to your motor but unable to hit it.
Put the top back on your condenser and spin the blade with your ductboard knife (a pencil might work) to verify that it cannot hit any wires.
Wire your new motor to the new cap as shown in the 4 wire diagram if necessary.
When you restart the unit, verify rotation (that the condenser discharges air from the top).
"Tip of the Day" Remember to remove power first.
[this message was edited by Houston204 on Sat 10 May 18:19] |
| theduke03
| "Re(1):replacing condenser fan motor" , posted Sat 10 May 10:10:
My advice is stop and call a pro. Not nearly as easy as it looks. Unless you want your backyard to look like this:
"My dad was the most feared furnace fighter in Northern Indiana."
[this message was edited by theduke03 on Sat 10 May 10:19] |
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