Original message
| ifmozart
 |  "Carrier Ignition Failure"
, posted Thu 31 Jan 19:55  
I have a Carrier weather maker high efficiency furnace. It was installed in 1993. When the furnace is energized, the ignition lights up and gas is sent to the combustion chamber. It lights briefly, then blows itself out, then tries again for a few times. Most of the time it lights on the second or third try. However, sometimes it does not. For this reason, I called an hvac expert and he told me the White Rodgers 36E36 gas valve was bad. Well, I had this valve replaced and it sill does the same thing. So I tried to troubleshoot the furnace myself. First, I disconnected the intake and the exhaust tubes that led to the roof, to test for blockage in the pipes. This did not help at all. It still sputtered when trying to light. Next, I covered about 30% of the 3 inch diameter intake and let the furnace try to light. This worked great. The furnace now lights up great on the first attempt every time and heats the house effectively. My question is: why does the furnace need this kind of restriction in order to light? Further, after the furnace lights, it runs the same with and without the 30% restriction.
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Replies:
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| enginerd
| "Re(1):Carrier Ignition Failure" , posted Fri 8 Feb 22:26
This happened to me recently. I removed the flame sensor, used a dry cloth to wipe it clean, and then replaced it. When I replaced it, I was sure to position it so that it was closer to where the flame would be. The furnace worked great after that. Now I am getting inducer/gas valve fault, so I may have just avoided the inevitable valve replacement. Good luck!
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| jbwstroker
| "Re(1):Carrier Ignition Failure" , posted Thu 31 Jan 23:11
There was a recall on Carrier high efficeincy furnaces due to faulty heat exchager designs. I'm not sure if your model falls into this category, but just Google "Carrier Recall" and you should be able to find out.
"I'd probably be considered an old wise man if I could only remember everything that I've learned".
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| | jbwstroker
| "Re(2):Carrier Ignition Failure" , posted Thu 31 Jan 23:14
Here you go:
Settlement Update: Federal Court Grants Preliminary Approval to Proposed Nationwide Class Action Settlement with Carrier Corporation
On November 21, 2007, U.S. District Court Judge Ronald B. Leighton granted preliminary approval to a nationwide settlement in a class action lawsuit filed by current and past owners of high-efficiency furnaces manufactured by Carrier Corporation equipped with polypropylene (plastic) laminated secondary heat exchangers. Approximately three million U.S. consumers purchased the furnaces covered under the settlement since January 1989. Carrier sold the furnaces under the Carrier, Bryant, Day & Night, and Payne brand names. The settlement also resolves companion cases in Canada and will be presented to courts there for approval as well.
The settlement offers a cash payment for the tens of thousands of consumers who paid to repair or replace their furnaces as a direct result of the alleged defect in the secondary heat exchanger. The settlement also provides an enhanced 20-year warranty for consumers whose furnaces have not yet failed that will cover parts and labor for failures caused by the alleged defect.
The Proposed Class
The Court has granted conditional certification of the following settlement class:
All individuals and entities in the United States who currently own a Carrier 90% high efficiency condensing furnace manufactured between January 1, 1989 and the date of final approval of the Settlement and equipped with a polypropylene-laminated secondary heat exchanger, and former owners of such furnaces whose furnaces experienced secondary condensing heat exchanger or CHX failure.
The Court has set a hearing to determine whether to grant final certification of the settlement class and final approval of the settlement agreement for April 22, 2008. In the coming weeks, notice will be provided to class members by first class U.S. mail and other means as to their rights under the settlement, including how to submit a claim or opt out or object to the settlement. Click here to read the Court’s order granting preliminary approval to the proposed settlement.
Background on the Litigation
The complaint, originally filed in June 2005, alleges that starting in 1989, Carrier began manufacturing and selling high efficiency condensing furnaces manufactured with a secondary condensing heat exchanger (“CHX”) made of inferior materials. Plaintiffs allege that as a result, the CHXs, which Carrier warranted and consumers expected to last for 20 years, fail prematurely. Carrier has denied these allegations and has vigorously contested the litigation. The Court has not made any ruling on the merits of plaintiffs’ allegations.
Get More Information
If you own a Carrier, Bryant, Day & Night or Payne furnace and and would like more information regarding the settlement, please click here to contact us. Alternatively, you may visit the official case website, http://www.furnaceclaims.com /.
"I'd probably be considered an old wise man if I could only remember everything that I've learned".
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| | jbwstroker
| "Re(3):Carrier Ignition Failure" , posted Thu 31 Jan 23:18
Click on the link from above, then the link for Models. Guess what? Looks like you have a lemon. Contact your local Carrier Dealer.
"I'd probably be considered an old wise man if I could only remember everything that I've learned".
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| | static
| "Re(4):Carrier Ignition Failure" , posted Thu 31 Jan 23:25
quote:
Looks like you have a lemon. Contact your local Carrier Dealer.
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Lemon? C'mon now, it's a 15 year old furnace.
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| | jbwstroker
| "Re(5):Carrier Ignition Failure" , posted Fri 1 Feb 09:39
Yes, but it may have been a lemon right out of the factory. Just took awhile for this lemon to rot. :)
"I'd probably be considered an old wise man if I could only remember everything that I've learned".
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| | static
| "Re(2):Carrier Ignition Failure" , posted Thu 31 Jan 22:53
Thanks, I didn't think you'd do it.
I find that most 90% furnaces draw in far more air than they need for combustion anyways.
That being said...there's lotsa things that could conceivably cause a problem like this.
Regulator going bad at the gas meter.
Cracked or leaky collector box.
Water backing up in the secondary heat exchanger.
Secondary heat exchanger or inducer motor failing.
In this case I'd recommend for safety's sake that you have the heat exchanger inspected by a Factory Authorized Carrier dealer.
If your secondary heat exchanger is failing, Carrier is very likely to give you a new one free or a credit towards a new furnace.
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| static
| "Re(1):Carrier Ignition Failure" , posted Thu 31 Jan 22:13
Please post the model number, if you dare to.
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| | hvacperson
| "Re(2):Carrier Ignition Failure" , posted Fri 1 Feb 14:54
does it blow itself out or does the gas valve de-energize? If the gas valve de-energizes the you need to check the flame sensor signal - replace sensor if below whats required to prove the flame.
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| | jimhvacr
| "Re(3):Carrier Ignition Failure" , posted Thu 7 Feb 11:30
Are there any symptoms to look for with the failure of the secondary heat exchanger. I have a listed model that is locking out on code 34 with a good flame signal when I am on the job. Thanks in advace for any info.
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| | giannit
| "Re(4):Carrier Ignition Failure" , posted Sun 13 Apr 12:40
quote:
Are there any symptoms to look for with the failure of the secondary heat exchanger. I have a listed model that is locking out on code 34 with a good flame signal when I am on the job. Thanks in advac
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Ours failed and you could see staining the PVC outlet tube and there was a lot of rust in the manifold. When the unit was removed, it was quite rusty and it stained the area just above the blower compartment. It may be possible to see rust stains if you can get a look behind the blower. Removing the blower should be easier than removing the secondary heat exchanger.
JT
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