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Fisher and Paykel fridge-freezer, fridge not cooling

We have a refurbished Fisher and Paykel fridge/freezer. The fridge part has stopped cooling, we had the same issue last year when we first bought the fridge and the people we bought it from repaired it under warranty. From memory I think the fan unit had failed. The freezer portion appears to be working but for the last few weeks we have had issues with the fridge and freezer icing up. Ideally would like repaired today or tomorrow.