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Kitchen Aid refrigerator temperature keeps rising especially in the freezer. Model kfcs22evms2. It is fairly new and has worked well until last few days. Fridge is full of food but not too extreme degree and has previously held as much with no problem. Freezer temperature starter rising slowly a few days ago and is now at 24 F. Last night, I vacuumed a moderate amount of dust/lint from coils at bottom front (behind grille) but the temperature rise continues. There is no dust around the back panel, fan is blowing strongly. There is no blockage or obstruction around the air vents inside fridge or freezer.

KITCHENAID® REFRIGERATORWARRANTY ONE-YEAR FULL WARRANTY ON REFRIGERATOR For one year from the date of purchase, when this refrigerator is operated and maintained according to instructions attached to or furnished with the product, KitchenAid or KitchenAid Canada will pay for factory specified replacement parts and repair labor costs to correct defects in materials or workmanship. Service must be provided by a KitchenAid designated service company. SECOND THROUGH FIFTH YEAR FULL WARRANTY ON CAVITY LINER AND SEALED REFRIGERATION SYSTEM PARTS AS LISTED In the second through fifth years from the date of purchase, when this refrigerator is operated and maintained according to instructions attached to or furnished with the product, KitchenAid or KitchenAid Canada will pay for replacement or repair of the refrigerator/freezer cavity liner (including labor costs) if the part cracks due to defective materials or workmanship. Service must be provided by a KitchenAid designated service company. Also, in the second through fifth years from the date of purchase, KitchenAid or KitchenAid Canada will pay for factory specified replacement parts and repair labor costs to correct defects in materials or workmanship in the sealed refrigeration system. These parts are: compressor, evaporator, condenser, dryer, and connecting tubing. Service must be performed by a KitchenAid designated service company.