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Old 10-11-2012, 10:25 AM   #1
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Board HK42FZ011 led rapid flashing


I have a carrier gas furnace and the led is continously rapid flashing and nothing works . ican some noice . please help me

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Old 10-11-2012, 10:56 AM   #2
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Board HK42FZ011 led rapid flashing


Do some searches both within this site and using Google for "Carrier trouble codes" or "Carrier troubleshooting codes".

Some threads here that can start you off:

carrier furnace

Carrier 58SXC120 Furnace

Also search Youtube for helpful tutorials on troubleshooting furnaces.

Give furnace model also so pros can help.

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Old 10-11-2012, 11:05 AM   #3
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Board HK42FZ011 led rapid flashing


Your furnace should have a diagnostic fault code legend inside the furnace. Usually on the furnace doors inside.
Try turning off the furnace power for a couple of minutes and then turning it back on and report back what the furnace does.
You mentioned some noice but gave no details?
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Old 10-11-2012, 11:07 AM   #4
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Board HK42FZ011 led rapid flashing


Agree with diyorpay...at least provide furnace model number. Also, usually a sticker is on the service panel detailing fault codes.

For some Carrier furnaces rapid flash is reversed line voltage polarity. Was this unit working up until recently?
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Old 10-11-2012, 11:51 AM   #5
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Board HK42FZ011 led rapid flashing


my furnace model is 58mca60-12. the problem started with fan was contionously running. then i open the control board look for any sign .There was a burn spot and trace were broken. I repaired the trace and put it back
then I turned it on I heard some thing trying to get started and led flashing rapidly and after sometime now no flashing and every thing is dead.
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Old 10-11-2012, 03:20 PM   #6
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Board HK42FZ011 led rapid flashing


I checked the continuity of both limit switch both are fine. I already order a new control board. Is there anything else should I check before putting the new control board. thanks
Right now furnace is just dead

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