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Old 05-10-2010, 03:55 PM   #1
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code 24 on Carrier furnace


The error code light on my furnace is 24 which translates to short circuit on one of the wires or fuse is open. I've already replaced the 3amp fuse multiple times and it keeps burning out.....any suggestions??

I really don't want to call a tech and pay them $150 minimum.

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Old 05-10-2010, 09:21 PM   #2
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code 24 on Carrier furnace


Look for a short in your low voltage wiring.

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Old 05-11-2010, 12:12 PM   #3
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code 24 on Carrier furnace


how do i look for the short? do i have to have a meter?
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Old 05-11-2010, 12:24 PM   #4
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code 24 on Carrier furnace


You can start by taking the t-stat wires off the circuit board including the 2 wires that run out to your a/c unit and see if the fuse still blows. that will help you figure out if you have a short in the a/c unit, t-stat or t-stat wiring. and if the fuse still blows you have a short in the furnace itself.
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Old 05-12-2010, 11:41 PM   #5
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code 24 on Carrier furnace


perhaps another couple hundred fuses before you get the magic one

sorry couldnt resist
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Old 05-12-2010, 11:48 PM   #6
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code 24 on Carrier furnace


The condenser is a common location for this low voltage short...

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