Blower Fan Continually Runs After Heat Has Stoped - Appliances - DIY Chatroom Home Improvement Forum


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

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 11-11-2011, 02:05 PM   #1
Newbie
 
Join Date: Nov 2011
Posts: 3
Rewards Points: 10
Default

Blower fan continually runs after heat has stoped


How do I troubleshoot this issue?

Advertisement

Bob Stein is offline   Reply With Quote
Old 11-11-2011, 02:07 PM   #2
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,486
Rewards Points: 2,620
Default

Blower fan continually runs after heat has stoped


Are you saying it never shuts off? Never ever!

Advertisement

__________________
XXX
Bud Cline is offline   Reply With Quote
Old 11-11-2011, 02:49 PM   #3
Newbie
 
Join Date: Nov 2011
Posts: 3
Rewards Points: 10
Default

Blower fan continually runs after heat has stoped


Correct. The heat shuts off but the fan keeps running and never shuts off.
Bob Stein is offline   Reply With Quote
Old 11-11-2011, 03:23 PM   #4
Member
 
raylo32's Avatar
 
Join Date: Nov 2006
Location: Maryland (DC 'burbs)
Posts: 1,096
Rewards Points: 604
Default

Blower fan continually runs after heat has stoped


Are you sure you don't have the fan selector on your t-stat in the "on" position?
raylo32 is offline   Reply With Quote
Old 11-11-2011, 03:35 PM   #5
Newbie
 
Join Date: Nov 2011
Posts: 3
Rewards Points: 10
Default

Blower fan continually runs after heat has stoped


It's in the auto position but the fan runs as if it is in the on position.
Bob Stein is offline   Reply With Quote
Old 11-11-2011, 03:42 PM   #6
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,486
Rewards Points: 2,620
Default

Blower fan continually runs after heat has stoped


Okay someone that knows about these things will be along after work and should be able to help. My guess is bad limit switch but I don't know what I'm talking about. Maybe that isn't what it is called.

Until someone else does dive in - how long has it been doing this?
__________________
XXX
Bud Cline is offline   Reply With Quote
Old 11-11-2011, 04:06 PM   #7
Member
 
raylo32's Avatar
 
Join Date: Nov 2006
Location: Maryland (DC 'burbs)
Posts: 1,096
Rewards Points: 604
Default

Blower fan continually runs after heat has stoped


First thing I would check is to see if you have 24vac to the g terminal of the furnace board when the heat is off the and blower is still running. If there is voltage there then you probably have a bad t-stat or a short in the stat wiring.

Otherwise it could be the furnace circuit board. Generally the blower should run for a minute or 2 after the heat call is satisifed and the burner goes out to extract the heat and cool the heat exchanger. I believe that this can determined by temp or more likely just a fixed time. It would depend on the model of your furnace and how it controls this to figure out if it is the main circuit board or something else.

Post your exact brand/model.

Advertisement

raylo32 is offline   Reply With Quote
Reply


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
Furnace blower not working on heat mode Sixshot HVAC 1 10-26-2011 09:02 AM
blower runs, with no heat captjack HVAC 6 12-14-2010 03:15 PM
uneven heat: testing ceiling radiant heat /finding cables/fix cables martinradiant Electrical 1 10-03-2010 09:22 PM
Blower motor in old bryant furnace runs constantly GetYourShineBox HVAC 2 07-20-2010 08:49 PM
Heat Pump wont run, but Blower fan runs Roger M HVAC 1 07-09-2010 05:18 PM




Top of Page | View New Posts