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Old 02-10-2020, 09:54 AM   #1
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Need Help Figuring Out Error Code On Carrier Furnace.


Hi everyone. I have a Carrier furnace that is behaving erratically. It works during the day when the temperature is not too cold but it does not work at night when it is cold. I went to the attic to check it and I see the blinking led but I am not sure as to how to figure it out. The sequence seems to be short blink, long blink and immediately three short blinks.


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Old 02-10-2020, 10:00 AM   #2
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Re: Need Help Figuring Out Error Code On Carrier Furnace.


There should be a sticker on the front or back of one of the doors with a legend with the code.

First digit is the short blinks and the second digit is the long blinks.

Post the model # of the furnace.

Look in : view yuri's album under my avatar pic and I have a basic Carrier legend in there with some codes.
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Old 02-10-2020, 10:19 AM   #3
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Re: Need Help Figuring Out Error Code On Carrier Furnace.


Here is a link to a video of the blinking led.

The model number is CK5BXT04.
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Old 02-10-2020, 10:35 AM   #4
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Re: Need Help Figuring Out Error Code On Carrier Furnace.


Should be a code schematic listed on the furnace.
Need the model number for the furnace. That one is the evaporator model.
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Old 02-10-2020, 10:42 AM   #5
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Re: Need Help Figuring Out Error Code On Carrier Furnace.


That is a code 14 meaning ignition lockout.

I would start by cleaning your flame sensor. It should look similar to the one in this video.

Use clean steel wool or #400 emory paper. A dollar bill may not have enough grit in it but can do in a pinch.

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Old 02-10-2020, 10:49 AM   #6
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Re: Need Help Figuring Out Error Code On Carrier Furnace.


Yes there is a sticker showing the codes but I am confused as it states that the first digit is determined by the short blinks and second digit by long blinks but I get one short, one long and three short blinks again which is confusing.
The model number I provided is the only sticker with a model number I can find. I'll check again and will post it.
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Old 02-10-2020, 12:03 PM   #7
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Re: Need Help Figuring Out Error Code On Carrier Furnace.


Model number will be in the burner compartment
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Old 02-10-2020, 12:47 PM   #8
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Re: Need Help Figuring Out Error Code On Carrier Furnace.


I cleaned the flame sensor as suggested. The furnace is working for now but will see how it behaves at night.

Thanks for your help.
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