RF267AARS/XAA Samsung Refrigerator - evaporator heater not working even in FF / rd

[doland]

Model Number

RF267AARS/XAA

Brand

Samsung

Age

More than 10 years

Hi, I have a Samsung RF267AARS/XAA fridge. When we go into manual mode and go to fresh food defrost (rd) the heater element is supposed to get hot to the touch, right? Mine does not. I checked it with a multimeter in the ohm setting and it does show that it is working (the numbers change to 103.6).

I thought the sensor might be bad but the issue of the heater not going on in forced defrost makes me think otherwise. I've done the Fd mode as well and the heater doesn't heat up either.

So can the heater still be bad even tho the multimeter said it's fine?

 

[Jake]

No, your heating element shows good, so it can't be bad. The defrost sensor needs to be covered in frost or in glass of ice water for the heater to come on and heat.

In the Forced Defrost Mode the defrost sensor still controls the heater operation. When defrost is activated the main PCB will turn over defrost control to the sensor in about 90 seconds. If the defrost sensor reads a temperature above the shut off point it will tell the main PCB to turn off the defrost voltage.

Here's the defrost sensor for your model: Thermo Bimetal-Protec DA47-00243S

Jake

 

[doland]

It show no longer available at that link. But I wanted to test it first to make sure that's the culprit. I placed both the thermostat and the thermister in ice and trned on forced defrost rd mode. The heater did not heat up. When I check the thermostat in ice with a multimeter it changes to ,9. Does this mean it works?

The thermister does not change when the mm is at the lowest ohm 200 setting. However it does show 11.xx when I set it at 20k. Can you verify what settings on the mm I'm supposed to check them at? thx

 

[Jake]

When I check the thermostat in ice with a multimeter it changes to ,9. Does this mean it works?

Leave the defrost thermistor in the glass of ice water for at least 5 minutes before ohm testing it. At 32 degrees it should be 13,300(13.3k) ohms.

If both the heater and defrost thermistor ohm test good, then only part left is the main control board: Pba Main DA41-00413C

Jake

 

[doland]

Here's the defrost sensor for your model: Thermo Bimetal-Protec DA47-00243S

But this is the thermostat, not the defrost sensor, right? If the thermostat is defective, would that cause the heater to not turn on in forced defrost mode?

Also, confirming that in forced defrost mode Rd or fd, the heater element is supposed to be hot to the touch.

 

[Jake]

Here's the defrost sensor for your model: Thermo Bimetal-Protec DA47-00243S

Also, confirming that in forced defrost mode Rd or fd, the heater element is supposed to be hot to the touch.

Correct.

Jake

 

[doland]

Correct.

Jake

That part is no longer available. DA47-00243S

Can I use other similar parts like DA47-00243K or the one ending with D, C etc? Wondering if the only difference is the connector, I can use the old connector and connect the wires.

 

[Jake]

Can I use other similar parts like DA47-00243K or the one ending with D, C etc? Wondering if the only difference is the connector, I can use the old connector and connect the wires.

That I don't know. Hopefully another tech knows and can tell us.

Jake