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Discussion Starter #1
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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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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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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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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Discussion Starter #6
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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Discussion Starter #8
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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