Wilfred the fan on my zanussi fridge - freezer znb 3450 s keeps freezing up

Hello,

Most times this is a bad cold control, but there are other things to check for. Make sure the condenser fan is working and the coils are not covered with dust. A separated heat exchanger ( small capillary tubing soldered to the large suction line ) can separate from one another and make the fridge run too long. - tape tubing back together. A poor working evaporator fan motor could also make the fridge run too long and freeze - replace the fan motor. An inefficient compressor or refrigeration system could make the fridge run too long and freeze - have a service tech check this out. A misaligned control settings, make sure the air damper and cold control have not been bumped and are out of normal settings. Stuck open air diffusers or air dampers are becoming more and more common for allowing too much air to be blown into the fresh food section and freezing things. On all frost free fridge's the freezer temp air is blown into the fresh food section, if you have "easy" to freeze items ( eggs, veggies in water, etc ) in front of or under where the freezer temp air comes out, they could freeze - store them in a different spot. Doors not closing properly making the fridge run too long is something else to check for.

Hope this help in solving the problem....

check the condensor fan if that aint it unit may be low on charge

If the refrigerator and freezer are both working properly. Then the only problem would be the alarm, It's either the placement of the alarm thermometer or the alarm thermometer is stuck closed.

more than likely the defroster inside the freezer has gone bad. This defroster is located in the space between the fridge and freezer and activates to defrost the freezer and stop build up of ice in the freezer.. If it is bad the freezer will not keep the fridge nor freezer cold.
Dave

Check the vents in the fridge side and close a little if you can. On the freezer side just for good measure>>>>
Is your circulating fan working?
Sometimes they stick and need a shot of WD 40 and then work
it back and forth a little until it wants to take off again. Keep me informed
and PLEASE give a Thumbs Up for the effort. The Raz Shack

Check to condenser coil and make sure it is clean and the fan near it is running when the compressor is on. Check for ice build up in the freezer. If the evaporator coil is iced up the box will run warm. It may be a defrost problem, a dirty condenser, or a refrigerant issue.

no, its probably weak capacitors which provide power to switch the relay. Take the control board out and ask a friendly TV repair tech to change the capacitors

Hi . Most freezers with the condenser coils at the back do not work when the temperature where it is placed gets below (( 5 degree c ))?? IE in a garage if it is freezing weather outside. One solution is somehow to keep the condenser compartment warm. Check the makers website. for what they say about it

Yes, I think you have a problem that can be fixed easily by a repair technician. The sound as you described it could have come from the air circulation fan in the freezer compartment striking ice. As the ice builds up it could have stopped the fan from rotating and air flow to the refrigerator compartment.

Check the fan motor