[havetools]

The temp control panel allows you to set temps in freezer and fridge. The indicators work fine, but the compressor keeps running way past the desired temps, so it gets unnecessarily cold (if in fact the display is accurate) and runs longer than it should, eating electricity

A note about model # - this is the number that is on the fridge
zIsb480dmc

[jimmack]

I have the same problem in a ZISS420DMCS. The thing freezes everything eventually. The GE tech came out and changed the control board, made no difference. The quick chill ran forever trying to warm the drawer. I put some plastic film over the vent at the bottom of the freezer compartment, and the fridge ran fine for 8 days. Today I checked the dampers, they work fine. Still trying to figure it out.

[richappy]

You might have system problems. Pull the back freezer panel and verify all the coils are frozen. If ok, measure the back freezer wall temperature and post.

[havetools]

This is a 400 pound built-in unit with uneven stone floor in front of it... VERY difficult to pull out -- is there no way to fix/diagnose using only the equipment available on the top or inside access from the front?

[richappy]

The panel is inside the freezer, not in the back.

[jimmack]

The fridge has behaved itself since my last post, the temps are OK, nothing is freezing that isn't supposed to. All I did was visually inspect the dampers in the quick chill (where everything was frozen solid) and clean the schmutz off the coil. Who made that so hard to get at?
Perhaps the dampers were frozen; I never heard them move in diagnostics mode.