Are the condenser coils clean? I usually find these to be the
The defrost timer should be one of three places:
behind the toe kick where you can see the condenser coils
under the refrig at the back
Up in the top of the refrig section where the light bulb and
control panel are located.
Here is one of the better sites on the internet about appliances:
You can get unit specific answers and order parts there. Your
unit shows an electronic circuit board, I wonder if they have
moved the defrost timer to a board.
A live Singing Valentine quartet,
Click to see the full signature.