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Old 11-23-2008, 07:59 PM   #1
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Why is this red wire not plugged in?


Hi all, every winter I have to open the front pannel on my roof top Carrier A/C unit and reset the gas valve to make the heater work. Well this summer I had an A/C tune-up done and today I went to reset the gas valve and noticed a loose red wire.

There are three wires coming off the pilot lighting system: two plug into some kind of a control unit. The red wire is not plugged in, its just sitting next to an open plug numbered 5. The red wire runs to a probe about an inch long that burns bright red when the flames start to blow. The heater works fine that we have noticed, should I plug this wire in?

thanks for the help.

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Old 11-24-2008, 12:51 AM   #2
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Why is this red wire not plugged in?


either trace the wireing diagram or see if you can take a pic of the part/ and diagram and post it

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Old 11-24-2008, 07:35 AM   #3
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Why is this red wire not plugged in?


Was the ignition module changed out recently, or last winter.
If so, they may be using a module that uses the internal sensor instead of teh external flame sensor.
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