Product review (5 stars): You might be able to fix rather than replace
I have a Samsung side by side refrigerator (RS2630SH/XAA) that I have replaced the fan on once.  As others have said, you can't remove the fan blade from the motor on the original motor.  My first one started making a chirping sound the finally drove us nuts as it became more consistent.  The first one was on warranty.  The replacement  started with some intermittent chirping about 2 yrs later, but then it stopped.  In the last few days we've been noticing an unusual odor and finally isolated it to the refrigerator.  In taking ff the back panel I could see that the fan was not running.  When spinning it backwards with my finger, it offered some resistance but when spinning it forward it looked like it wanted to start spinning but didn't.  I sprayed some WD40 on the shaft and spun it again several times and it took off on it's own, but then stopped again after a minute or two.  Sprayed it again and it kept going.  FAILURE WAS DUE TO POOR LUBRICATION.

Removing the motor: I had decided to replace the motor and fan blade, but after reading other reviews about how to get the motor out, I removed it by unplugging it and pushing up on the tab behind the motor and sliding it straight out, then having to rotate it with some difficulty to get it out.  If you can see a small spring on your fan blade where it fits on the shaft, you can replace it easily, so you won't need to order the fan blade.

Removing the fan blade: Take a small flat blade screwdriver and slide the retaining spring up and off.  You may have to loosen the three tabs by gently spreading them apart with the screwdriver.

Use some electric motor oil and with the shaft pointing up, drip some oil down the shaft, the spin the shaft to get it to run down to the bearing.

Put the blade back on.  Re-install the motor assembly.  Plug it back in.  Plug the refrigerator back in and wait abut 15 sec for the refrigerator to boot up and the fan should start spinning.

If this doesn't work, then go for the new fan, but not the blade if yours is held on by a spring.

Hope this is helpful.  I'll let you know if it keeps running for more than a week with the lube job.