Question about Carrier Furnace Control Board Bryant HK42FZ034

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HK42FZ034 status code light blinks in pattern

My Carrier furnace has stopped working all together. I noticed that the red light on the control panel is blinking in a particular pattern - 2 short blinks followed by 4 longer ones. I tried to research what the different codes mean for this control panel but cannot find anything. Thanks in advance for any help@

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Located on the schematic on the inside of the furnace door should be a key for the blink sequence. 2 short blinks then 4 long ones would be a code 24 on that data plate

Posted on Apr 14, 2014

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Posted on Jan 02, 2017

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SOURCE: Furnace wont run

First of all when you flip the switch, it goes thru a startup sequence. THEN it turns on the Igniter (notice the red glow). Then the gas turns on.

Now at this point check the idiot light and it should be giving you a code of 34. That 34 (3 shorts 4 longs) says that there was a problem igniting the furnace. After it cycles thru at least 4 times and fails to ignite all the blowers, then is when you get a code 14 (1 short 3 longs)

NOTICE what's happening with ALL the burner Tubes each time it attempts to ignite. If only one or two are running....then this is your problem.
To fix all you do is take out the burner Tubes, look for debris, blow them out (blow from the front where all the jets are), and replace them in sequence from left to right (the tabs overlap).


Posted on Feb 01, 2009

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