condenser fan spins very slow

Refrigerator & Freezer Repair
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1

Help
did some test to see if the motherboard is bad or the condenser fan motor, here are the results. J2 and pin 8- 13.64VDC
J2 and pin 4-10.8 VDC
J2 and pin 3- 13.64 VDC
J2 and pin 5- 3.8 VDC
what is bad? the condenser fan motor or the motherboard?

2

Thanks for the help.

3

— Begin quote from joenkathy;496717

Thanks for the help.

— End quote

You’re welcome,

You’ll have it figured out and repaired in no time.

:slight_smile: :slight_smile: :slight_smile:

4

My condenser fan runs very slowly also. It is on a GE GBS22HCRAWW bottom mount freezer refrigerator.

I get similar readings (although I’m not sure what your other probe is contacting).

I measured from the back of the plug connected to the motherboard’s J2 socket with the fridge running. Measured between pin 3 (FAN COM) and all the other wires.

J2: 3-8  (Wh-Rd) = 14.0V  Supply 
J2: 3-5  (Wh-Pk) = 3.3V Cond Fan
J2: 3-4  (Wh-Yl) =  13.2 Evap Fan
J2: 3-1  (Wh-Bl) =  6.6 Evap RPM

The 3-8 reading is in spec, but I’ve found conflicting info on weather the pin 3-5 reading indicates a motherboard problem. One source indicates that a ~4 V reading on fixed speed fan models indicates a motherboard problem. Another source indicates that only the pin 3-8 supply voltage is important and that for this case the fan is the problem.

The original poster here did not follow up with their outcome.

Can any kind experts or the OP help me out?

Thanks in advance,
Michael

5

— Begin quote from m_p_v_13;730642

My condenser fan runs very slowly also. It is on a GE GBS22HCRAWW bottom mount freezer refrigerator.

I get similar readings (although I’m not sure what your other probe is contacting).

I measured from the back of the plug connected to the motherboard’s J2 socket with the fridge running. Measured between pin 3 (FAN COM) and all the other wires.

J2: 3-8  (Wh-Rd) = 14.0V  Supply 
J2: 3-5  (Wh-Pk) = 3.3V Cond Fan
J2: 3-4  (Wh-Yl) =  13.2 Evap Fan
J2: 3-1  (Wh-Bl) =  6.6 Evap RPM

The 3-8 reading is in spec, but I’ve found conflicting info on weather the pin 3-5 reading indicates a motherboard problem. One source indicates that a ~4 V reading on fixed speed fan models indicates a motherboard problem. Another source indicates that only the pin 3-8 supply voltage is important and that for this case the fan is the problem.

The original poster here did not follow up with their outcome.

Can any kind experts or the OP help me out?

Thanks in advance,
Michael

— End quote

Michael,
Disconnect and test the condenser fan motor resistance, there should be a reading of 1.5 to 3.0 ohms resistance.

Your "Motherboard" should be supplying 13 VDC to the condenser fan motor if its a single speed motor and 9 VDC in the slo speed winding. Check the voltage at the "motherboard" with the fan motor disconnected, that way if the motor is bad, we’re not getting a false reading, due to the "drag" .

Good Luck and Thanks