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两台燃气热水器故障现象不同，但是损坏原因一模一样，只是巧合吗
维修两台燃气热水器，一台显示E4，另一台能工作但水不热，虽然故障现象不一样，但是损坏元件一模一样，这只是巧合吗？专业的事情找专业的人来做
燃气热水器不启动，没有热水，常见故障维修合集76/113
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