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Why is my evaporator fan not working?

Hi there,

I'm currently in the process of determining why the evaporator fan is not functioning inside my Samsung SR331NW dual fridge/freezer.

Compressor is still functioning and the freezer is cold, the fan is just not operating and blowing the cold air back into the fridge. Condenser coils were fine and not built up with ice.

I've removed the internals of the freezer out and tested the fan, finding a resistance of ~600 ohm and ran fine when 240VAC was plugged directly into it.

I then tested the voltage coming from the fridge connection itself with a DMM and only recorded ~30VAC.

Im wondering if perhaps there is a dodgy relay on the main PCB, Temp control board that has burnt out partially closed, but am out my depth in regards to what other potential source it could be?

Any suggestions would be warmly welcomed!

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Hi,

Are there any specifications written on the fan itself as to voltage and current rating, to give any clue as to what voltage to expect?

Can you locate where the fan wiring "leaves" the control board? (I realize that this may be difficult).

If you can measure the voltage where it leaves and it is the same it proves that the wiring harness is OK to the fan connector.

Be safety aware if you decide to do this!

par

Hi jayeff,

The fan is a 240VAC fan but unsure of current rating, part number has IS-3120SNL5A,--> 5 Amps? seems excessive though?

I removed the fan connector clip from its housing at the top of the freezer, applied 240V to the fan clip, fan runs fine. Tested connector port in freezer with DMM, parallel to fan plugged in and measured 30VAC.

Basically, I dont want to have to tear the PCB out until im relatively sure its necessary. I have a habit of doing this and 9/10 times its something much smaller....

par

Hi,

Fair enough.

The 30VAC may be a misleading reading though. You may be picking up a reading coming on the neutral that is being fed through from another path in the wiring etc etc. and there may not be any active supply at all to the fan.

If you can access the board, without having to remove it, switch off and disconnect the power to the fridge and then apply a s/c to the fan connector and see if you can read the s/c with an Ohmmeter at the board. I'm not sure if the fan wires go direct to the board or if they may pass through other connectors or not.

This way you know that the problem is back at the board or not.

par

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