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

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 12-22-2012, 10:50 AM   #1
Newbie
 
Join Date: Dec 2012
Posts: 1
Share |
Default

Nordyne CMF 80 Won't Stay Lit


Came home from work Thursday night to a cold house. After trouble shooting and watching YouTube videos I figured out that it might be the ignitor. I took the part out and sure enough the ceramic coil was cracked. I found a compatible part at Grainger, listed the model of coil on the back of the package to the broken one in hand and installed last night. Once back in place I hear the unit begin the warm up cycle, hear the ignitor light and gas start but within a few seconds I hear it cut out. The longest I've gotten it to run is a minute, something keeps tripping it out. I am getting 3 flashes which is telling me that there might be a "false flame" but really unsure of where to go from here. Any help would be appreciated. Now that it's the weekend before Christmas I doubt I am going to find any "good" part stores open and really can't afford to have a plumber here to check it out. Not sure if the igniter is the wrong one, where I would find the right one, or if it's the gas valve or something else. I appreciate any advice, can take pics and post any more info if needed.

musicman6886 is offline   Reply With Quote
Old 12-22-2012, 11:38 AM   #2
Roofmaster
 
Join Date: Oct 2012
Location: Maryland
Posts: 3,423
Default

Nordyne CMF 80 Won't Stay Lit


I dont know your particular furnace, but if you initiate call for heat with the burner box open do all of the burners light and burn a nice blue flame? If they do, I would clean the flame sensor lightly with fine steel wool, put it back and initiate the ignition sequence. If you have the type where the ignitor and flame sensor are close together, check the flame hood to make sure it has not warped, and make sure the flame sensor is in the flame envelope.

If Yuri or the other HVAC Pros come on they will be able to tell you more accurately, as they know the particulars to most every brand of furnace out there.

Meanwhile, try what I said above.

__________________
" A lot of men build things, and a lot of things fall down "

jagans is offline   Reply With Quote
Old 12-22-2012, 12:41 PM   #3
Hvac Pro
 
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 8,919
Default

Nordyne CMF 80 Won't Stay Lit


False flame is extremely rare, make sure you read the code properly. May be low flame signal. Then you need to clean the flame sensor. It sits in front of one of the burners and has white porcelain holder and looks like a nail, clean it with clean steel wool or fine emory paper.
Attached Images
 
__________________
"Cut it twice and it is still too short".
yuri is offline   Reply With Quote
Old 12-22-2012, 04:23 PM   #4
Member
 
Join Date: Oct 2009
Location: Nebraska
Posts: 2,362
Default

Nordyne CMF 80 Won't Stay Lit


If it is a false flame code with no actual flame then that means (1) the flame sensor or flame sensor wire are touching ground or (2) the control board has failed and giving false error codes. Double check the legand as yuri said.
Marty S. is offline   Reply With Quote
Reply

Tags
furnace, igniter, nordyne cmf80


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Nordyne Gas furnace won't stay lit MB1 HVAC 7 11-20-2013 04:45 AM
garage door won't stay closed albertkao General DIY Discussions 12 10-07-2013 10:26 PM
furnace wont stay lit goatboy0067 HVAC 4 12-08-2012 08:21 PM
Heater will not stay on HAMP HVAC 4 02-10-2011 12:16 PM
Nordyne condenser goodman A-coil wtroger HVAC 10 09-16-2009 03:52 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.