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Old 01-22-2009, 12:58 PM   #1
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vent sucks cool air instead of blow heat


two bedrooms in my house have developed the same problem. the return in each sucks are normally, but additionally the vents don't blow heat, instead suck air in a little. not as much as the return though. all my "output" vents at the furnace are connected. all other vents connected to furnace are ok.

thanks

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Old 01-22-2009, 06:09 PM   #2
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vent sucks cool air instead of blow heat


Check the air filter and evaporator coil to make sure they're clean.


Last edited by SKIP4661; 01-22-2009 at 06:09 PM. Reason: typo
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Old 01-25-2009, 02:11 PM   #3
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vent sucks cool air instead of blow heat


thanks. it's only two vents though the others are great.
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Old 01-25-2009, 10:10 PM   #4
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vent sucks cool air instead of blow heat


Something had to have changed in the system like someone changed some damper settings. Try closing down on some dampers or registers to increase static pressure on the duct system. This should help. Make sure you mark the oridginal damper settings so you can always put back as it oridginally was.
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