ʻE lava ke pehe ko e ʻikai ke ola lelei ʻa e ʻiuniti ʻi tuʻa ʻo e fakamoʻoni fakamoʻoni ʻo e fakamoʻui fakamoʻoni ki he defrost ʻe lava ke pehe ko ha ngaahi meʻa lahi: ha malfunctioning ʻi tuʻa defrost sensor resistance, ha siamu ʻi he founga ʻe fa fulihi ʻa e housi, pe kuo teʻeki aʻu e mafana ʻo e ʻea ki he huʻanga ʻoku fie maʻu ki he defrosting.