Was it good before? Sounds like not enough return airflow.

回答: 問個furnace的問題sweetptt2012-12-20 12:24:30

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tenants said it is always like that. today is cold, the heat is -sweetptt- 給 sweetptt 發送悄悄話 sweetptt 的博客首頁 (0 bytes) () 12/20/2012 postreply 12:57:10

Then it is either return clogged by junk or the vent layout is f -borisg- 給 borisg 發送悄悄話 borisg 的博客首頁 (0 bytes) () 12/20/2012 postreply 13:07:51

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