Chosen Solution
The temperature in my GE Monogram fridge is very low. The reported temp in the fridge is 28C, and the lowest available set temp is 34C. From other posts here and elsewhere, it seems like the most likely cause is the damper assembly. I read that the damper door can be seen through the vented window behind the ice maker. I removed the ice maker, removed the vent, and took the attached photo toward the fresh foods section. I assume the window in the photo is the actual damper door window. Does the photo show the door open, or is the door just a dark color? Also, if the problem is thermistors and not the damper, would the LED readout in the fridge report temperature accurately (meaning it has a separate sensor)? Or does the LED temperature display also get its information from the same thermistors, so it would report something above the set temp? Thanks!
Hi, Have you tried placing an appropriate thermometer in the refrigerator compartment to check whether the displayed temperature is accurate or not, (within a degree anyway)? The display temperatures are usually derived from the temperature sensors in the compartments. There are 3 temperature sensors in your model. One each in the fridge, freezer and quick chill section Here’s a link to the parts diagrams for your model Given the cost of the refrigerator sensor (part #336 - fresh food section) as opposed to the damper control unit (part #367 or #368 fresh food section) it may be worthwhile replacing it first to see if that resolves the problem. There are other suppliers online. Just search for ZISB420DRA parts to get results for suppliers that suit you. You could test the sensor but would have to know its’ specifications, (which I don’t) to see if it was still within specs. Normally they are NTC (negative temperature co-efficient) thermistors which means that as the temperature increases, their resistance decreases and their datasheet would show what their known resistance value is at any given temperature within their operating range. This resistance value is used by the control board to determine what should happen to maintain the compartments within their set operating range. Looking at an image of the damper in the parts list, it shows that the shutter is black in colour but it is hard to tell from your image of it whether it is partially open or shut. At least for me anyway ;-) Can feel if any air is coming though it? The evaporator fan in the freezer compartment will stop when a door (either door, refrigerator or freezer) is open, so to feel for the air coming through the damper with a door open, manually operate the door switch to turn off the light in the compartment. The door switch(s) are usually also used to signal the control board to turn the evaporator fan on when both the doors are shut and off when either door is open. You don’t want to be blowing the cold air out of the compartments. By manually operating the door switch(s) you fool the control board into thinking that the door is shut and the fan should start again. The evaporator fan should run as long as the compressor is running
