Hi,
We left town for a week, and didn't notice that our refrigerator door (side by side, whirlpool-style) was ajar!
When we came back, the fridge was warm, but the bottom of the freezer was cold. I defrosted the fridge/freezer, and thought everything would be fine. No luck, a few days later the fridge was warm again.

I figured it was a defrost problem which blocked airflow to the fridge. I took the back panel off the freezer, and saw that the evaporator fan was spinning, so I reasoned it was probably the defrost thermostat. I attempted to test that by immersing in ice water, and it read open-line, so I replaced that. No luck! Still a warm fridge after 2 days.

So I tested the defrost heater by energizing it, and it heated up and melted the ice. This fridge does not have a 'defrost timer' it's part of a circuit board. The parts people suggested the 2203080 circuit board, which is the fridge control pad (with the buttons and LED lights). I replaced that for $150 and no luck!

Any suggestions? I am trying to get this into diagnostic mode by pressing the 'water filter' and 'power' buttons for 3 seconds, within 13 seconds of powering up. I am unable to get into the diagnostic mode.

Can anyone tell me how to get into diagnostic mode, or suggest another part I should check? There is one other $200 circuit board located near the compressor, should I try that one? Getting to the point where I obviously should have called someone, or saved up for a new fridge...
Thanks you!

Just ordered it-thanks so much! Should have posted earlier!

Is this the proper way to go to diagnostics? Hold 'water filter' then press 'power' hold for 3 seconds until a beep? This should be done within 13 seconds of 'power up'-does that mean plugging in, or turning on the power via the 'power' button?

I got a new board (however it appears to be defective with a bad solder joint on a capacitor). I tried to push the capacitor back in so it makes a good connection, to test the diagnostic mode, but no luck. When I get the replacement board, I would like to test the defrost circuit right away, to verify that I have actually fixed it, so can you help me out? How can I force a defrost cycle on this thing?
Thanks!