Question about Heating & Cooling
Motor turns hard when you turn fan
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Posted on Jan 02, 2017
the mfd is stamped on the side of the capacitor.Be careful to kill the power and to NOT touch the terminals.The capacitor is capable of holding a charge even after power is disconnected.
Posted on Jul 29, 2008
Thanks for the suggestion. I figured out the problem. The replacement fan motor I bought was general fan motor. it had 5 wires. Two of them went to the capacitor (this unit has combo capacitor, 3 leg). I followed the schematic diag on the motor and connected one leg to the C and the other leg to the FAN on capacitor. what was happening, the start winding was working against the run winding in the motor. Once I switch the wires in the capacitor, fan ran at full speed. thanks again for your reply.
Posted on Oct 15, 2008
SOURCE: I have an older Goodman CKB 18-1
FOR QUESTION 1: They do run independantly. What will happen when your compressor is running but your outdoor fan does not, the pressures in the system will go really high and compressor will overload. That outdoor fan is used to disipate all the heat that is transferred from the inside to the outdoor unit.
FOR QUESTION 2: If you hear humming it can be 2 things. FIrst one is that that capacitor went bad. Dependiing if its a dual run capacitor(which helps both compressor and fan motor) or they both have individual capacitors. The second would be a bad fan motor. OPen your service panel outside to the AC. Find your capacitor for you fan motor. if there are 2 , locate the one that goes to your fan motor. Check it out(if its blown physically youll will notice it like really bubbled, like swollen) then change itout. Or you will have a dual run capacitor that runs both compressor and fan motor. It will have the terminals marked (Fan, Common, Herm) Bsically check your capacitor mfd(micro fared rating, it will say on the capacitor what its rated) Get a multi meter and put in the "MFD' selection. Before you check any capacitor you have to discharge the the voltage charge it has. Use an insulated handle screwdriver and just place the metel part across the capacitor leads. Basicall short them out. Then proceed with checks...hope this helps( remember to always pull the disconnect out from the box outside to cut power)
Posted on Jul 30, 2009
your looking at $175-$225 for just the single phase motor depending where you purchase, I just replaced mine(identical unit) due to screaming dry bearings, if you replace it your self make sure to keep new wires tight along side of unit or fan will cut them if loose and its a fan- 5mfd/25mfd compressor@440volt cap
Posted on Sep 27, 2009
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