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I have a armstrong compak 10 gas pack and I replaced the circuit board and the lcd light is blinking 4 times then it stops and blinks 4 times again can you please tell me what this means.

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Hi, Silver Wings
Although there are a number of things that can cause this scenario (a "lockout"), it is usually related to an air flow problem (dirty filter, blower wheel, indoor coil, duct problem, dampers closed, return air or supply air registers blocked, etc.), a failing temperature limit switch, or is related to a flame sensing problem.

The flame sensor is easiest to check and they rarely fail. You can clean it with a scotchbrite pad and inspect it for cracks in the porcelain. Some of the air flow issues you can check, and others will require a trained technician. Testing the limit switches requires an electrical test meter and knowledge of how to use it.

If I were to make a guess based only on the information you have given me, I would be looking most closely at the air flow.

Thanks, Ben

Posted on Sep 02, 2010

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thought I would post this here for everyone.

1 blink STV 5v sense DG Board

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3 blinks 3.3v SOS D Board

4 blinks Power SOS P Board

5 blinks 5v SOS D Board

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3 blinks 3.3v SOS D Board

4 blinks Power SOS P Board

5 blinks 5v SOS D Board

6 blinks Driver SOS 1 SU / SD / SC Boards
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7 blinks Driver SOS 2 SU / SD / SS Boards
(SC floating voltage area)

8 blinks Driver SOS 3 SS Board
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9 blinks Panel Config. SOS

10 blinks Sub 5v SOS / Main 3v SOS DG Board
DTV 9v SOS / Tuner Power SOS

11 blinks Fan SOS PB Board

12 blinks Sound SOS H Board

13 blinks Communication error DG Board
with IC8001 (Pesks Lite 2)























7 blinks Driver SOS 2 SU / SD / SS Boards
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8 blinks Driver SOS 3 SS Board
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9 blinks Panel Config. SOS

10 blinks Sub 5v SOS / Main 3v SOS DG Board
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11 blinks Fan SOS PB Board

12 blinks Sound SOS H Board

13 blinks Communication error DG Board
with IC8001 (Pesks Lite 2)

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1 Answer

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I hope I shed some light on the subject for you.

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