Question about Refrigerators
you have one of three problems and only one problem
the defrost timer is bad
the defrost heater is bad
the defrost thermastat is bad
only one of the above is the problem but no way to know without checking each part with and ohm meter
Posted on May 07, 2008
You have to replace the door seal. The seal may be a mundane technology and it isn't the only technology making a refrigerator frost-free, but it is the most important one. Warm moist air enters through the gap in the door seal, condenses on cold surfaces and freezes. The frost interferes with airflow and prevents the system from keeping the fridge cold. Turning it off for a day allowed the frost to melt.
Posted on Aug 10, 2008
How to check
If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.
check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.
You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.
Your evaporator coils frost up in normal use and every eight hours or so the entire unit shuts down and the defrost heater comes on to melt the frost. This cycle last about 20 minutes. The melted frost drips into a drain pan and through a drain tube to the drain tray under the freezer/refrigerator where it's evaporated by the condenser fan.
Posted on Sep 02, 2009
Testimonial: "Really useful advise, with link to more help. Thank you"
servis frostfree fridge freezer not working after 2weeks holiday returned it had completely defrosted fridge & freezer power supply still connected. warning light on. done all the trouble shooting in the srvice manual still want go cold or freeze. light on in the fridge, no water in the rear tray & cleaned the overflow pipe??. Model No M0330-ALU 5yrs old. think it has 2 seperate thermostats, surely they wont both have gone at the same time???????
Posted on Oct 13, 2009
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May 17, 2012 | Refrigerators
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If there is no cooling at all on the fridge section but the freezer works then it is confirmed that the compressor and gas pressure is OK. Now shut off the fridge and leave it powered off while you clean and check the evaporator for frost. If frost is seen it is a good indication as the compressor is working with sufficient gas within.
Now after about 6 hours plug in the fridge to start. Observe cooling to happen in about one hour and ice to from under three hours.
Earlier make sure that the thermostat was set to normal mode for freezer and fridge.
However if ice forms in the freezer then observe the fridge for about 24 hours for cooling to continue and the fridge to cut off . If not the auto defrost timer, or the thermostat must be checked. Frost formation without defrosting could block the air flow and so shut the air passage to the fridge. Also the blower fan must work and if this is not working then the fan can be faulty. Also a fault on the control unit is a suspect to non functioning of any one of these components.
If defrost timer works but frost keeps forming check while the compressor shuts if the heaters are working, check continuity of the heaters.
So try this test using a multi-meter on the defrost timer and the thermostat and make your observations so that we come to the solution.
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