Have a whirlpool fridge W4TXNWFWQ03 fan runs constantly and back wall of freezer is iced.
Answer Hello Ronnie. It sounds like you may have a defrost problem with the unit. Check and see if there is any frost build up on the evaporator coils in the freezer. If so, you will need to test the defrost heater and the defrost thermostat. They should read closed for continuity when cold. You can test this with a multi-meter TJMA-DMT3. I will include a link at the end to assist you how to use the multi-meter if needed. If both parts are good, you will need to replace the control board. Once the problem is repaired, you will need to thaw out the ice on the coils before the unit will operate properly. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html
The freezer is working. The cold air will not go down into the refrig. unit causing the freezer to frost up. Thanks
Answer Hello Joe. Check and see if the fan motor is running. If not, you will need to order and replace the fan motor on the unit.