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Old 10-28-2012, 05:52 PM   #1
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American Standard (Trane) 90


This furnace was installed in 1996. Inducer does not come on, I have 1 red light at bottom of control panel lit up solid. Above that, a green light flickers dimly. Above that, I have another red light, this one is flashing slowly.

I have taken off the pressure tubes, blown through them, checked for condensation, and done anything else I can think of. I can't find anything on the inside of the door that tells me what is wrong. Any suggestions would be very much appreciated.

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Old 10-28-2012, 05:59 PM   #2
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American Standard (Trane) 90


What is the model number of the furnace? On or behind the blower panel should be a legend that tells you what the LED lights mean.

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Old 10-28-2012, 06:20 PM   #3
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American Standard (Trane) 90


AUY100R9V4A0

I can't find the legend, I'll keep looking. I turned off and back on the power, and now the inducer seems to be running, but it still hasn't lit. There are 3 red lights in a row at the near the bottom of the panel. First one is lit up. The green light that was flickering is now on solid green,and there is a red light up above that which is lit. Thanks.
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Old 10-28-2012, 06:24 PM   #4
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American Standard (Trane) 90


You have a variable speed furnace. Ill get you a manual, hold on.
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Old 10-28-2012, 06:31 PM   #5
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American Standard (Trane) 90


Installers guide
service facts

Page 8 of service facts has the legend
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Old 10-28-2012, 07:50 PM   #6
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American Standard (Trane) 90


I'm not positive, but it looks like it is saying I have a bad control panel. Inducer is running, but it doesn't light. I may have to call a tech. Thanks for your help.
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Old 10-28-2012, 08:05 PM   #7
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American Standard (Trane) 90


With the components in that furnace I agree that you should call a tech.
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Old 10-28-2012, 08:12 PM   #8
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American Standard (Trane) 90


yep agree call a tech ..ben sr

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