PCB burned Samsung frost free combi fridge freezer 432L

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There should be a defrost timer built into the fridge, every fridge has them. This may need replacing.

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Check out these tips...they can help you figure out whats going wrong with your refrigerator and why it is not cooling

Refrigerator not Cooling or Fridge not Cooling

How to Defrost Refrigerator Defrost Timer Problem

Water Running in refrigerator from Freezer

heatman101

ther is a small fan in the freezer that keeps air moving, that is what makes it frost-free, the fan is probably burned out

Your refrigerator is likely a frost free model. There is a heating element that runs around the freezer compartment. It is probably the heating element that is causing the original damage to progress.

Most fridges have a way to turn off the frost free part, usually via the timer or or easy as pulling the fuse for the circuit. Pull the fridge out, climb behind it, unplug fridge, and remove access cover, if equipped. Look for a wiring diagram. It will tell you where you need to disable the frost free at.

If you can't disable the frost free, then replace fridge now. the acrid smoke you smell is toxic, and is detrimental to food, as well as to human life. Stop using the fridge, or disable frost free.

next time it does this unplug for 20 mins and pcb will reset its self....

replace defrost timer pcb.

Frost free fidges are supposed to stay frost free because the automatically defrost regularly. When they do this they may drain water down to the bottom of your fridge. Look for a tray that catches this water underneath the unit. Make sure yo keep it emptied. If you live in a very warm climate you may be getting a lot of humidity inside. There may be a switch that you can change for lower moisture.

Look to the freezer side for the possible problem. If the freezer evaporator coil is freeing up due to a defect in the defrost system the refrigerator temperature will be the first place it will show. Look for frost build-up on the freezer back wall.