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Old 01-08-2009, 05:57 PM   #16
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Carrier Unit not cycling properly


I stand corrected. It is the igniter. In fact you don't want to touch it cause you don't want the oil from your skin on it. Am I right Skip??

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Old 01-08-2009, 06:13 PM   #17
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Carrier Unit not cycling properly


Well, good news and bad news, after I cleaned the flame sensor, I tested and low and behold, I got it to exhibit the problem. It is flashing a code 13, Limit or Flame Roll-Out Switch Lockout- Auto reset after three hours. Flame roll-out switch requires manual reset. Refer to code #33

Code #33- If open longer than three minutes, code changes to #13
check for-
then gives six things to check

Where do I go from here? Manually reset the flame roll out switch? If so, how do I do this?

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Kent
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Old 01-08-2009, 07:51 PM   #18
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Carrier Unit not cycling properly


The roll out switch should be just above where the burners go into the combustion chamber. It should have a small button about 1/16" square. Push it in to reset. The switch itself should be about the size of a quarter.

NOW, why did it trip?? bad heat exchanger? blocked heat exchanger? Go thru the checklist and check it out.
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Old 01-09-2009, 07:39 AM   #19
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Carrier Unit not cycling properly


OK, thanks. I pushed it and it seemed to go through a little internal checklist, the inducer motor turned on for a few seconds, then the ignitor, then the blower. Where is the heat exchanger located so I can take a look at it or should I leave this to a professional? You mention a 'bad' heat exchanger? What would a 'bad' heat exchanger look like?
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Old 01-12-2009, 12:00 PM   #20
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Carrier Unit not cycling properly


Well, I had an HVAC tech come out and he believes it is a bad board. Now, sometimes the inducer is just dropping out once the call for heat is started. Looking at close to 500.00 for board and installation..yikes!...wondering how difficult is actually is for a competent person to switch out this board if I purchased the board myself?
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Old 01-12-2009, 03:06 PM   #21
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Carrier Unit not cycling properly


If that board has a black case over it there is an updated board that requires some minor wiring modifications. Not too hard to replace if you follow the instructions with the new board. There is also a vent safety switch by the inducer outlet, have had these trip occasionally.

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