FIXED RF28HFEDTSR/AA Frozen FZ Pipe

[WildMan7856]

Model Number

RF28HFEDTSR/AA

Brand

Samsung

Age

6-10 years

My Samsung RF28HFEDTSR/AA refrigerator's bottom ice maker stopped making ice. I looked at a few posts on this forum and dug through the manual. I checked the pipe to the ice maker, and the water in it was completely frozen. I measured the heater's resistance, and it measured correctly according to its label (72 ohms), so I don't think there's an issue with the heating element itself.

Based on all that, I think I need to replace my Main PCB board. Does anybody with more experience agree? Should I check something else? I'm surprised I didn't get a fault code for no water flow to the ice maker. I see there's a flow meter, and I assume that's how it knows how much water it is sending to the ice maker.

FYI, I don' actually know how old the fridge is.

 

[Jake]

Here's the service manual for your model: https://drive.google.com/file/d/1TAr7JobRaVaf6Z4MRf-2JFC-3xJolr1T/view?usp=sharing

Look on Page 58--->FZ-Ice Pipe Heater.
When measuring the resistance of the Main PCB CN79 Yellow-Pink wires, it should be within 102Ω ±7%.
0Ω : heater short, ∞Ω : Check for Wire Open or Connector Slip-out.

Unplug the refrigerator and take a ohm reading from the Main PCB--->CN79 Yellow-Pink wires

Here's your parts diagram: Parts for Samsung RF28HFEDTSR/AA-00: Cabinet Parts

The main PCB is #19.
The Ice Maker fill tube heater is #27-1.

 

[WildMan7856]

Look on Page 58--->FZ-Ice Pipe Heater.
When measuring the resistance of the Main PCB CN79 Yellow-Pink wires, it should be within 102Ω ±7%.
0Ω : heater short, ∞Ω : Check for Wire Open or Connector Slip-out.

Yeah, I saw that and was confused when I measured 72Ω until I saw the heater's label. I measured from CN79, and still got 72Ω. It's just a few feet of wire between the PCB and the heater, so I would be more concerned about the wires themselves if they somehow had 30Ω resistance. Wire this size would have to be 6000' long to see that much resistance. The wiring diagram in the manual shows no other components in series with the heater, so it's not like something else would cause the resistance to be that high. Maybe the manual is either wrong or out of date? Or my refrigerator is old? But, the image in the part diagram you referenced also shows 72Ω. I don't know.

I'm going to replace the board and see what happens

 

[Jake]

Yes, I see that image that says 72 ohms on the heater wire. So I'm not sure either if that manual has a misprint or not.

I'm going to replace the board and see what happens

That's what I would do, seems the heater is good at 72 ohms on that tag on it.

Let us know how it goes.

 

[WildMan7856]

Replacing the board worked!

 

[Jake]

Excellent, glad to hear that.

Thanks for the update!