Light bulb gone out and fridge freezing - Refrigerators

Replace the thermostat and probably the bulb also.

if removing the mother board made no difference to the fridge operation then it would be logical that the mother board is faulty
These machines do not like power surges( can originate many miles away)
have a technician check it out

change the control board, it gets bad from blowing out light bulbs,if you've had to replace bulbs and they don't come on and they buzz when replacing its definately the board part#4334000 appliance parts pros 1-877-477-7278

check light switch sticking or gone bad

Usually the light bulb base is a screw, to remove it you need to rotate it clockwise (facing your fridge). I highly recommend you to use a towel to handle the lightbulb for safety reasons.

If you are replacing it, please be aware that you should use a 25W or 45W light bulb.

Hope it helps.

i had the same problem recently with all my fridge food freezing up, this all seemed to start when i discovered the interior bulb blown i replaced it still nothing also noticed warning lights on front out,i could hear the motor going so i knew it was on i removed back cover and found the heater covered in ice it turned out it was the failure of the control board causing these problems had it replaced and working fine now hope this is of help dmb23

Your door switch is bad.  When doors are opened, the fan stops.  No cooling.  When it closes, fan starts.  Bulb is just an indicator of no power to unit...probably burned out contact in switch.

YOU HAVE A BAD THERMOSTAT,REPLACE,MAKE SURE DRAIN IS CLEAR TO,THANKS-MIKE

a servicing expert told me when bulb goes can cause a failure on control board. others confirmed control board failure occurs often and the only other part that goes is the compressor (and thats really expensive to repair!). control boards can be fitted yourself - mine cost about £50.