Very old fridge (Excellence brand), but it worked well until I had it moved. Now the freezer works fine but the fridge is barely cool. It forms heavy frost immediately after being defrosted, on the back wall of the fridge. Very little frost in freezer. I can't even find this model online anywhere.
Pull freezer back panel and check for frost. If completely frosted, turn defrost timer till compressor stops. Check if it now defrosts, if so you have a bad defrost timer, if not you have to check defrost thermostat and defrost heater.
Fridge warm, lots of frost 
