Blower Operates Continuously - HVAC - DIY Chatroom Home Improvement Forum


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

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

Reply
 
Thread Tools Display Modes
Old 11-29-2007, 06:05 PM   #1
Newbie
 
Join Date: Nov 2007
Posts: 2
Rewards Points: 10
Default

Blower operates continuously


I have a Bryant (Model: 396G036075) Gas Furnace. I recently replaced the thermostat with a Rite Temp (Model: GPMG8035C) 7 day programmable thermostat. The furnace blower runs continuously. The furnace still kicks in and warm air emits from the vents until the house reaches the set temperature. However the fan is still running after the furnance acheves the set temperature. It stops blowing warm air and just blows room temperature air thru the house vents. When I first moved into the house there was a manual thermostat installed. I then replaced the manual with a used Rite Temp thermostat that just died. I then just recently purchased a brand new Rite Temp described above. The old Rite Temp thermostat never had this issue. The thermostat fan is set to auto and even if the thermostat is set to off the blower continously runs. Here is what I've tried to fix it:

1) The air filters were dirty so I replaced them with fresh ones.

Powering Furnance OFF steps: turned off the furnace power switch, flipped the furnace breaker to off, set thermostat to off and fan to auto

Powering Furnace ON steps: flipped furnace breaker to on, turn on furnance power switch with the thermostat set to off and fan to auto.

As soon as I power the furnance up the blower starts running and never stops like its supposed to after the house reaches the set temperature.

Do I need to buy another thermostat or is there something faulty on the furnace?

Advertisement

ryan0320 is offline   Reply With Quote
Old 12-02-2007, 08:57 PM   #2
Newbie
 
Join Date: Dec 2007
Location: Middle Tenn
Posts: 26
Rewards Points: 25
Send a message via Yahoo to mrkool
Default

Blower operates continuously


Could be, I've had issues with Ritetemp myself, now I only use Honeywell a lot less problems. If you take the green wire, or the wire that you should have put on "G" (fan), off, does the fan stop? If it does, it's the t'stat, if it don't, you have it shorted to the Red wire (R), either in the wall or somewhere else.

Advertisement

mrkool is offline   Reply With Quote
Old 12-03-2007, 09:31 PM   #3
Newbie
 
Join Date: Nov 2007
Posts: 2
Rewards Points: 10
Default

Blower operates continuously


I disconnect the "G" wire and the Furnace Blower still runs. Any other suggestions or do I need to call a pro?
ryan0320 is offline   Reply With Quote
Old 12-03-2007, 11:39 PM   #4
Member
 
Join Date: Nov 2007
Posts: 66
Rewards Points: 75
Default

Blower operates continuously


Does any wire ( or its detachment I should say) in your thermostat turn the blower off? You tried the green and nothing happened.
I’d re-read my thermostat installation instructions and re-install. I may even install a new thermostat. My purpose around the thermostat would to make sure it’s not the reason the blower won’t turn off.
Inside the furnace plenum (cavity above the burners in which the air is heated and connects with the air ducts) there should be a fan-and-limit control ( turns the fan on and off and the limit shuts down furnace in case of overheating) . I’d look for this module or similar. I may even pull a part # from it and price it at Apex on web to see if I’d gamble it’s cost on being the remedy. If the module has two wires running to it (one in and one out) then it would seem to be simple sensor that if I safely disconnected one of the leads while the blower was running without the burners running shouldn’t it trip the blower off? I really don’t know the answer but that’s part of the fun of diy, right?
I’m just a city living farm kid. Hope this helps. Good luck.
UBoiler 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
Comfortmaker blower intermittent problem jh44ny HVAC 12 07-31-2011 07:41 PM
Heat comes on but blower never does aczer HVAC 12 02-13-2011 07:57 AM
Blower control board mlmaher HVAC 1 11-24-2007 02:39 PM
Blower fan runs continuously mgeller HVAC 5 04-19-2007 10:27 PM
Induction blower seal ktritz HVAC 4 03-05-2007 09:52 PM




Top of Page | View New Posts