hi

my rs21 has had the samsung recall and new parts fitted
the evaporator heater failed after 13 months and samsung did'nt want to know
fitted a new evap heater and defrost sensor and the unit worked fine
now it is icing up again but this time around the tray heater at the bottom of the unit
i've tested the heaters for resistance and they seem ok the defrost sensor reads 6.9Kohms and the thermal fuse is ok
spent a lot of money on repairs and i'm tempted to buy a new unit
any ideas what the problem could be
i suspect the tray heater is faulty

best regards