IW ITHPIUQH222 2HSymptom Possible Causes Corrective ActionDefrost thermostat faulty Check defrost thermostat. Replace iffailed.Evaporator fan faulty Check fan motor. Replace if failed.Defrost heater remains open Check defrost heater continuity.Replace if failed.Defrost control faulty Check control and replace if failed.Open wire or connector Check wiring and connections.Repair as necessary.Refrigerant shortage or restriction Check for leak or restriction. Repair,evacuate and recharge system.Supply voltage out of specification Check input voltage. Correct anysupply problems.Faulty fan motor Check fan motor. Replace if failed.Restricted air flow Check condenser and grille for dirt.Clean.Frost or ice on evaporatorRefrigerant shortage or restriction Check for leak or restriction. Repair,evacuate and recharge system. 2g 2 2 !22 2!D2 2# D2 2 D2 2 2 2 22D2 2 2 $ 2 22 2 2h 2 2 22 2 2 22 i 22 2 2 2 2 2 222 2 G 2 ! WARNING