電磁閥線圈燒壞，可拆下電磁閥的接線，用萬用表測量，如果開路，則電磁閥線圈燒壞。原因有線圈受潮，引起絕緣不好而漏磁，造成線圈內電流過大而燒毀，因此要防止雨水進入電磁閥。此外，彈簧過硬，反作用力過大，線圈匝數太少，吸力不夠也可使得線圈燒毀。緊急處理時，可將線圈上的手動按鈕由正常工作時的“0"位打到“1"位，使得閥打開。
電磁閥卡住。電磁閥的滑閥套與閥芯的配合間隙很小(小于0.008mm)，一-般都是單件裝配,當有機械雜質帶入或潤滑油太少時，很容易卡住。處理方法可用鋼絲從頭部小孔捅入，使其彈回。根本的解決方法是要將電磁閥拆下，取出閥芯及閥芯套，用清洗，使得閥芯在閥套內動作靈活。拆卸時應注意各部件的裝配順序及外部接線位置,以便重新裝配及接線正確，還要檢查油霧器噴油孔是否堵塞，潤滑油是否足夠。
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