Usually that means that the heat exchange manifold is cracked. G

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heating unit 看上去还挺新的, 能修吗?还是要换新的? -大百百- 给 大百百 发送悄悄话 (0 bytes) () 12/03/2017 postreply 10:42:32

Get an HVAC person to look at it. -borisg- 给 borisg 发送悄悄话 borisg 的博客首页 (0 bytes) () 12/03/2017 postreply 11:02:17

好的,事关人命,应该请 LICENCED EXPERT。.谢谢, -大百百- 给 大百百 发送悄悄话 (0 bytes) () 12/03/2017 postreply 11:26:13

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