Carrier Furnace Flame Rollout Keeps Tripping - Why? - HVAC - Page 2 - 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 10-08-2011, 11:51 AM   #16
Member
 
biggles's Avatar
 
Join Date: Jan 2008
Location: Long Island
Posts: 3,630
Rewards Points: 2,000
Default

Carrier furnace flame rollout keeps tripping - why?


remove the flue pipe nearest the heat x and run your finger inide it look down into the exchanger

Advertisement

biggles is offline   Reply With Quote
Old 10-08-2011, 11:59 AM   #17
Newbie
 
Join Date: Oct 2011
Posts: 14
Rewards Points: 10
Default

Carrier furnace flame rollout keeps tripping - why?


The flames not not seem to waver when the fan comes on but at least one flame jet seems almost mis-aligned so that not all of the flame is getting into the heat ex. There is some rust on the ports where the flame comes out and perhaps flame is leaking out there? I'm talking about the metal tubes, not the brass nozzles.
Billyv is offline   Reply With Quote
Old 10-08-2011, 12:01 PM   #18
Newbie
 
Join Date: Oct 2011
Posts: 14
Rewards Points: 10
Default

Carrier furnace flame rollout keeps tripping - why?


Biggles:
Sorry do not understand. What do you mean by flue pipe nearest the heat exchanger? Thanks for your help
Billyv is offline   Reply With Quote
Old 10-08-2011, 12:23 PM   #19
Newbie
 
Join Date: Oct 2011
Posts: 14
Rewards Points: 10
Default

Carrier furnace flame rollout keeps tripping - why?


This is what the flames look like whether the fan is blowing or not.
Attached Images
 
Billyv is offline   Reply With Quote
Old 10-08-2011, 01:01 PM   #20
Member
 
biggles's Avatar
 
Join Date: Jan 2008
Location: Long Island
Posts: 3,630
Rewards Points: 2,000
Default

Carrier furnace flame rollout keeps tripping - why?


anything yellow is starving for air check those air adjuster if you have them where the nozzle is...that yellow one is producng soot.that flue is where the burnt gases rise up and out should be on top and a ducted 4" or so pipe going out even down the line from the burner...just want to see if you have soot tripping down the pipe..like on your car exhaust
biggles is offline   Reply With Quote
Old 10-08-2011, 01:14 PM   #21
Newbie
 
Join Date: Oct 2011
Posts: 14
Rewards Points: 10
Default

Carrier furnace flame rollout keeps tripping - why?


Disconnected the exhaust pipe and there was a bit of water and it is a bit dirty(sooty?). there is no adjustment for the air/propane jets they are just wide open flutes. Any other way to improve combustion so that all 4 ports are blue flames?
Billyv is offline   Reply With Quote
Old 10-08-2011, 01:37 PM   #22
Member
 
JJboy's Avatar
 
Join Date: Oct 2010
Location: Austin - Texas
Posts: 1,402
Rewards Points: 500
Default

Carrier furnace flame rollout keeps tripping - why?


If the flames is shaking check for heat exchanger leak
__________________

**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.
JJboy is offline   Reply With Quote
Old 10-08-2011, 02:02 PM   #23
Member
 
Join Date: Dec 2009
Posts: 641
Rewards Points: 500
Default

Carrier furnace flame rollout keeps tripping - why?


This furnace has a problem with the secondary heat exchanger failing and I have worked on many of them. Although the heat exchanger suffers from a manufacturer's defect, the real problem is improper commissioning (or lack of commissioning). There are three simple things you can do:

1)Feel the top of the furnace when it's running. It should be warm, but not hot.

2)Remove the hoses from the trap. There should only be clear "water". If there is brown sludge, then the secondary heat exchanger is probably plugged. Also, the hoses should should feel firm, not flimsy and soft. This is also a good indicator that the heat exchanger is plugged.

3)Pull the blower (5/16 hex head screws) and inspect the secondary heat exchanger. You should only see smooth metal. If it's plugged, and corroded through, you will see small brownish red balls or globs on the outside of the fins.

If you observe any of this, I can advise you further on what to expect from a repair. There are certain things which usually need to be replaced with the heat exchanger, so if the company has to travel far to get to your cottage, then it would be best if they brought them with, to avoid having to go back.
hvac benny is online now   Reply With Quote
Old 10-08-2011, 03:02 PM   #24
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,571
Rewards Points: 4,780
Default

Carrier furnace flame rollout keeps tripping - why?


Its probably one of the Carriers with the defective secondary heat exchanger. Carrier got sued over it. Not sure your covered under the suit, since you bought it used, and moved it from its original installation location.
beenthere is online now   Reply With Quote
Old 10-08-2011, 03:37 PM   #25
Member
 
JJboy's Avatar
 
Join Date: Oct 2010
Location: Austin - Texas
Posts: 1,402
Rewards Points: 500
Default

Carrier furnace flame rollout keeps tripping - why?


Quote:
Originally Posted by beenthere View Post
Its probably one of the Carriers with the defective secondary heat exchanger. Carrier got sued over it. Not sure your covered under the suit, since you bought it used, and moved it from its original installation location.
SO what is the problem with Carrier secondary heat exchanger?
__________________

**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.
JJboy is offline   Reply With Quote
Old 10-08-2011, 03:51 PM   #26
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,571
Rewards Points: 4,780
Default

Carrier furnace flame rollout keeps tripping - why?


http://www.omaha-home-inspection.com...y-furnaces.pdf
beenthere is online now   Reply With Quote
The Following User Says Thank You to beenthere For This Useful Post:
JJboy (10-08-2011)
Old 10-08-2011, 04:34 PM   #27
Member
 
Join Date: Dec 2009
Posts: 641
Rewards Points: 500
Default

Carrier furnace flame rollout keeps tripping - why?


While the material that Carrier used was poor, the real problem is poor installs. It's sad to say, but the majority of furnaces being put in today are simple hooked up to ducts, gas, electric and thermostat, then simply fire up while the contractor collects his payment and loads his tools into the truck. Of the 100 or so Carrier heat exchangers that I've replaced, ALL were the result of the installer not commissioning the furnace upon start-up/ poor installation. I've run into countless numbers of techs who think that simply checking the manifold pressure is enough. Hell, I've had to teach techs with 20+ years how to clock an appliance. The worst example that I've come across was a 100 MBTUH three stage Carrier furnace that was over firing by 20,000 in each stage! The company that installed it kept replacing the roll-out switch, without looking for the cause of the failure. By the time I got called to look at it both heat exchangers were toast, as well as about $500 in other components. There are far too many people doing work without gas tickets, as well as too many people with gas tickets who shouldn't have them in the first place.
hvac benny is online now   Reply With Quote
Old 10-20-2011, 08:48 AM   #28
Newbie
 
Join Date: Oct 2011
Posts: 14
Rewards Points: 10
Default

Carrier furnace flame rollout keeps tripping - why?


Finally back at cottage. Thank you hvacbenny. The top of the furnace does get too hot to touch after running for a while. I removed the blower and attached is a picture of the fins. They look pretty clean. Do they look normal to you? The second photo is of the very back of the furnace and looks like water has been dripping from the very back. Does that mean cracked heat exchanger? You mentioned you might be able to tell me what else to look for or what other parts to have the contractor bring?
Attached Images
   
Billyv is offline   Reply With Quote
Old 10-23-2011, 05:27 PM   #29
Member
 
Join Date: Dec 2009
Posts: 641
Rewards Points: 500
Default

Carrier furnace flame rollout keeps tripping - why?


It's hard to tell from your pics, but from the lower pic, the fins on the left look like the may be corroded through. Water leaking from the back is also common with plugged secondary heat exchangers, as the coupling box rots through. Since your furnace is in a cottage, I'd assume that it's probably not in as bad of shape as a similarly aged furnace with the same problem. If I were the service company, and had to travel quite some distance to you, I'd, at the very least, bring a coupling box kit (coupling box and cold spot baffle) as well as some extra hoses for the pressure switches along with a new secondary heat exchanger. How did the trap look?
hvac benny is online now   Reply With Quote
Old 10-24-2011, 09:48 PM   #30
Newbie
 
Join Date: Oct 2011
Posts: 14
Rewards Points: 10
Default

Carrier furnace flame rollout keeps tripping - why?


Well thanks everyone for your help! I was able to troubleshoot and eliminate a number of items. In the end, the secondary heat ex was quite restricted with gunk and had minor perforations and leaks. With the help of a contractor we pulled the whole thing out and verified this. So I am awaiting a quote for a new heat exchanger and a new furnace and suspect I will choose the new furnace. I am looking for a good quality unit that will not get used a whole lot but I want it to last a long time. What is a brand that will deliver good service at a good price? - don't need bells and whistles, just need to keep the pipes from freezing and provide basic heat when I turn it on the couple of times we go up in the winter.

Advertisement

Billyv 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
Trane Gas Furnace - blower on but no flame at burners herbert8101 HVAC 2 09-24-2011 09:23 PM
Trane XE 80 Furnace - flame out and restart Thome HVAC 3 10-12-2009 06:27 PM
gas furnace flame rollout Yoyizit HVAC 45 09-17-2009 09:06 PM
Carrier furnace problems BigK75 HVAC 1 07-30-2009 06:16 PM
New Cased Coil - Install to Furnace - PICTURES!! hartkem HVAC 39 11-18-2008 02:45 AM




Top of Page | View New Posts