Whole House Fan Louvres Don't Open - HVAC - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC


Thread Tools Display Modes
Old 09-21-2008, 01:56 PM   #1
Join Date: Sep 2008
Location: Edgewood, Maryland
Posts: 1
Rewards Points: 10

whole house fan louvres don't open

A few months ago my whole house fan worked nicely, but now it doesn't. The fan runs at its usual noise level, but the louvers in the attic floor/ hall ceiling don't open. When I push them open with a broomstick, they immediately fall closed again when I remove the broomstick. How do I fix this?


edunbar42 is offline   Reply With Quote
Old 09-21-2008, 02:00 PM   #2
Join Date: Jun 2008
Location: Costa Rica
Posts: 423
Rewards Points: 250

They may have a helper spring or cylinder that has broken or came loose. Do they move freely?


I may go home hungry, but not tired and hungry.
TazinCR is offline   Reply With Quote
Old 09-21-2008, 02:13 PM   #3
Registered User
Termite's Avatar
Join Date: Apr 2008
Posts: 6,520
Rewards Points: 2,000

TazinCR's right I'd imagine. I'd take the louvers down and check the springs on them. If one broke or came unhooked, the fan probably can't pull them open.
Termite is offline   Reply With Quote
Old 09-30-2008, 12:36 PM   #4
Join Date: Sep 2008
Location: Portland, OR
Posts: 1,186
Rewards Points: 500

There are different types of vents. Some a bariatric that open with pressure (or negative pressure in this case) and some need assisting with springs or power as is the case with powered vents.

Then again it could be that you have another opening in the attic and the air is coming in from there.

Go up in the attic and look around. Maybe you have a broken attic window that won't allow negative pressure to build up and open the vents in the ceiling.
Marvin Gardens is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
replumbing an old house simonfrog Plumbing 7 01-30-2012 04:45 AM
No House Wrap On New House JoeZ430 Building & Construction 34 11-29-2007 10:51 AM
help me solve this mystery please lindaberrien Roofing/Siding 17 06-12-2007 01:06 AM
Re-siding house jdig Building & Construction 5 04-10-2007 09:15 AM
Heating Retrofit in a Victorian Multi-Family House mumphis HVAC 1 09-30-2006 10:36 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1