Product review (4 stars): Similar but not exact.
The original Heater only had one heating coil not two like the replacement shown here.  The model number of the Refer is PSC23SGRCSS  GE.  What I did was to connect just one of the coils and left the other one not connected.  I suppose if I have further problems with the defrost heater I will just disconnect from one and connect to the other.  Everything else appears to be identical. The original unit appeared to be burned out inside the glass protected tube.  It had inconsistent continuity when I check it with meter.