Lennox Furnace Serial 6396j0178 Model 80mfg3-75a-5 - 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 02-02-2013, 11:07 PM   #1
Newbie
 
Join Date: Feb 2013
Posts: 2
Rewards Points: 10
Default

Lennox furnace serial 6396j0178 model 80mfg3-75a-5


From what I can tell, I believe I need a new flame sensor. Everything starts up, but than when the flames kick on everything turns off.

Suggestions? Does this sound right?

Thanks.

Advertisement

Minderella is offline   Reply With Quote
Old 02-02-2013, 11:26 PM   #2
Member
 
Join Date: Sep 2010
Posts: 453
Rewards Points: 252
Default

Lennox furnace serial 6396j0178 model 80mfg3-75a-5


A cleaning probably will buy time. Video: Clean with emery cloth, not sand paper.

Advertisement


Last edited by diyorpay; 02-02-2013 at 11:28 PM.
diyorpay is offline   Reply With Quote
Old 02-03-2013, 08:20 AM   #3
Newbie
 
Join Date: Feb 2013
Posts: 2
Rewards Points: 10
Default

Lennox furnace serial 6396j0178 model 80mfg3-75a-5


It's been cleaned twice. Yesterday, cleaned again. Worked for a couple hours and than started shutting down again.
Minderella is offline   Reply With Quote
Old 02-03-2013, 09:00 AM   #4
Member
 
Join Date: Oct 2009
Location: Nebraska
Posts: 2,362
Rewards Points: 1,000
Default

Lennox furnace serial 6396j0178 model 80mfg3-75a-5


The flame sensor is just a steel rod with a ceramic insulator. If the ceramic isn't cracked and the rod is clean than the problem is not the flame sensor. Rust on the end of the burners or a poor ground will also interfere with the control boards ability to sense flame being present.
Marty S. is offline   Reply With Quote
Old 02-03-2013, 10:11 AM   #5
Hvac Pro
 
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 10,112
Rewards Points: 862
Default

Lennox furnace serial 6396j0178 model 80mfg3-75a-5


espicially with that furnace. I have even had to run a green groundwire from one of the screws on the burner box directly to the circuit board ground to make them work better.
__________________
"Cut it twice and it is still too short".

Last edited by yuri; 02-03-2013 at 10:15 AM.
yuri is online now   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
Natural Gas Cost For Furnace 1 Hour Run Time hammerlane HVAC 15 11-11-2013 11:34 AM
goodman furnace Model # gmt070-3a Serial # 0303602933 wickwicky HVAC 4 10-15-2011 04:35 PM
Lennox Pulse furnace pau HVAC 4 10-11-2011 08:59 PM
Lennox Furnace Model #: 90UGFA3-75-6 GauravJ HVAC 3 10-30-2010 09:24 PM
1973 Lennox ES2 Furnace Noisy indygo HVAC 1 03-26-2006 08:43 PM




Top of Page | View New Posts