Fridge on Zanussi ZX56SI has stopped working but freezer fine

It sounds like what you replaced was OK. Check the condenser and clean it out and be sure the condenser fan is working.

How to check everything
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php


The fridge gets its cold air from the freezer through a vent(damper) between the freezer and fridge.The fan in the freezer blows air through it. There is a flap you adjust with the fridge temp. control. Make sure it's opening and closing when you adjust the fridge temp .

OR.
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 In most newer models the timer has been replaced by an electronic control board.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.

Sounds as though the compressor has stopped working. It feeds both compartments with control from a printed circuit above the top door.Where all your red lights are ablaze! (This can be replaced by removing the 2 screws and "clicking" out the small panel) Check that the compressor is running at the bottom rear of the fridge/freezer before anything else.

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

Ok there is a drain pan under the evap. coil under the fan that may be clogged and full of ice there is a 3/4" hole the water drains out of that needs cleared if there is a puddle of ice over it , the ice will also effect the airflow traveling down the duct to the fresh food section of the unit.
If there is no ice puddle at the bottom of the refrigerator then make sure the unit is cooling well by making sure it has been running for 10 min. or so and checking the coil in the freezer , it should have a small layer of frost on it showing its getting cold the whole way through it. Let me know how this works.

Phil

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.

i have had the same problem, it was the fan which needed to be replaced.

i think you mean temperaure rises!

probable fault is that the auto defrost is not working

same here. have the znb 4051s refridgerator. freezer works fine but fridge does not. there is no sound eminating from the fridge either...any ideas? its 1 year old!

The defrost cycle is not happening like it should, that's what causes the block of ice (and poor air flow). If you have all that defrosted look at the defrost bi-metal, it usually is a small round disk with a couple wires coming out of it and it's clipped on the coils. When it's cold enough, it passes electricity to the heat elements, when it gets hot enough it "opens" and kills power to the heat elements. If that is bad (swollen cracked or bloated) and not passing electricity to the elements that's the problem. Another item would be the defrost timer itself, if it doesn't work (no clock motor turning) then it will never go into defrost. And the last and usually least expected failure would be the heat element themselves not working