Simsim for Model Number RB2155SH Freezer OK ... fridge not cooling. Was alerted by the audible signal generally alerting that the door isn't closed, which continues going off at regular interval (1-2 min). When it happened, LED temperature display showed rapidly increasing fridge temperature from set/desired 38 up to ... room temperature 68 following day. Fan not spinning thus not circulating air in fridge compartment. Light apparently remained on (supposition based on observed high temperature) until it turned off; thought light bulb burnt out but did not as, after a period without power, light bulb lights when power is restored, though it initially doesn't turn off when the door is closed and, after a while, turns off again regardless of open/closed door or power supply. Tech visit: tested fan from alternative power source, fan works. Replaced main board, no change. Left with diagnosis of faulty sensor AP4138824. I ordered it, changed it, still same problem. Based on Q&A here I tested resistance for AP4136842 and found 5.9K which doesn't sound 'wrong'; tested resistance for AP4136048 and found closed / continuity. Suggestions before I look for/pay another tech to visit? Thanks
Answer Hello Simsim. Try unplugging the unit and reseting the control board. If this does not work, it sounds like the main control board DA41-00128D is bad and will need to be replaced. Hope this helps. Read More... Answered by AppliancePartsPros.com | Tuesday, January 3, 2012