Thanks to both of you for replying, it is a relatively new refrige and
I've checked everwhere for a mechanical timer, On the main circuit
board on the back one of the componts has defrost printed on the
circuit board next to a IC component that is about 3/4 x3/4 and I
suspect controls the timing. I did find the screen inside the back
compartment clogged with dust so I cleaned as suggested by Joe , so we
will see if that helps.
Thanks again both of you
Garyf

On Jan 26, 4:53 am, "Stormin Mormon"
wrote:
I've looked for a defrost timer and can't find one in the refrige..CY: if it's a mechanical timer, it's probably in the box with the
control knobs.

I would like to know if the defrost timer is part of the primary circuit board accessed from the
back of
the refridge?CY: Some newer fridges have a board, others use a mechanical
timer.

Is the defrost heater and defrost thermostat accesed from the panel at the rear of the freezer compartment?CY: Yes, and the freezeer section is usually narrow. Makes for
some strange twisting and bending to get at it.

I assume it is probably one of these parts and would like to know how to test
which is
the problem.CY: You can wait till it's frozen. manually advance a mechanical
timer, and then check the current draw. Five amps is about right
for a defrost heater. If it's not drawing five amps, very often
the heater and termination thermostat are replaced together.

Thanks for the help if someone can.
GaryfCY: Y'welcome.