When we switch on the fridge then fan is working then comprasser on freezer fan was not working model no is 408ymqg

Some models have a switch activated by the lower door or fridge door. If the door id open, the fan in the freezer will stop. That switch protrudes or bounce out when the door is open. Check is the switch is faulty. Check temperature setting for the fridge too. There is a fan that takes the cool air and blow it thru the vents to cool the fridge side. If the fan is in the freezer, check the direction of its rotation.
It should be sucking sir from the freezer and blowing out to the fridge vents.

Hi,

Your description is quite complete but is rather baffling. Pls bear with me while we process by elimination. A few basic/working ideas:

• most designs call for a single compressor to cool the freezer;
• the cold air in the freezer is drawn towards the fridge to cool that area;
• this is performed by a fan drawing air in the freezer through the evaporator;
• most would have a vent or air pathway to guide the freezer air;
• all would have thermostatic control to set the desired temperature;
• some designs have two thermostatic control , 1 for the freezer, 1 for the fridge.

As applied to your concern:

• compressor is working since freezer is OK;
• fan is working as you posted but is the air drawn from the freezer, better still, is the air forced/vented into the fridge?
• could you please check that the air is strongly blown into the fridge area;
• a little experiment, open the fridge door, look for and press on the door switch, the light should go out, after a lengthy seconds, the fan should trigger on, not only would it be audible, you would notice the frozen air swirling inside the fridge area. If you hold on long enough to the dorr switch, the compressor should kick in (if it is not already running) since the thermostat of the fridge area (if one is present) would sense that the fan is turning but the fridge area is not cooling.
  

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

on most units they have two controls refrigerator control is electric t-stat that runs compressor freezer control think of it as a door colder freezer door is barely open warmer freezer door all the way open all cooling coils are in the freezer and a fan moves the air to refrigerater side possible problem fan not running
door freezer control all the way closed
light switch broken light staying on door gasket not sealing tight find door switch press verify light shuts off and fan starts
look for torn or damaged door gasket can look from outside with light and see if gasket contacts case on all four sides
freezer is cold enough so compressor is ok hopr this helps good luck ron

Sounds as if your evaporator fan located in the fridge part of the appliance is out. This fan is usually located by the temp control switch. If you open the fridge and listen you should hear the fan humming , if not, then replace the fan. Take the model and serial number to an appliance store and they should be able to get you the part. Good luck on your repairs.

Dave

A fan controlled by a thermostat is required to move the cold air from the freezer to the refrigerator for cooling. Use a volt meter testing the voltage on the fan. If you have voltage it is a bad fan. If you do not get a voltage test the thermostat. If it measures zero ohms short the thermal switch or if it is a short open one lead. If the fan works replace the thermal switch.

sounds as if the evaporaator fan inside the fridge between the fridge and freezer is out. This fan is located between the freezer and fridge in the same area as the control switch for the temp. This fan isn't hard to replace you just need to take care of the removal of the plastic cover. Once the cover is removed the fan is accessed easily. Take the model and serial number to an appliance parts house for the proper part. Good Luck

Dave

make sure the evaporator fan is working, open door and push switch in if fan works make sure opening from freezer to fridge is not blocked. if door was removed make sure light in fridge is shuting off if temp in fridge is in the 50 degree range your light switch is not being deactivated check spacers between door and hinge . sometimes when door is removed a spacer will fall on floor and light switch is not hitting door

APM6855 Built in fridge freezer If Fridge is not cooling & freezer is ok then try a defrost by switching off for 24 hrs Then switch back on. it should be OK. If this does not work it is probably the door switch faulty , this should switch on the fan when door is closed. The fan is then controlled by thermostat sensor which switches fan off/on when required.

could be due to ice build up jamming the fan. take back panel off and check for ice. if ice present the defrost system has failed. also on some models, the fan stops when door is opened. check door switch is operating