American Standard Furnace Blinking Red Light

If you own an American Standard furnace, it is likely that you will have to troubleshoot it at some point in time. Fortunately, the American Standard furnace systems has an easy way that you can do just that.

These furnaces come equipped with what is known as a diagnostic light. This light can help you to determine if there is a problem with your furnace and what exactly that problem might be.

Near the bottom of the furnace unit, there is a small window with a red LED light. Depending on the status of the light, you might be able to locate the source of your problem.

If the furnace is working correctly, then the light will be continuously blinking red. There will be no long pauses between the blinks and the blinks will all be the same length.

When you are having problems with your American Standard furnace, the red blinking light might do some strange things. First of all, you might notice that your light seems to be sending you a code.

If you watch it long enough, you might notice that the light is doing three short blinks, pausing and then doing two long ones. If you see something like this at a time when your furnace is giving your problems, then the first thing that you should do is to write down the code.

The American Standard furnace red blinking light system is fairly easy to use once you know what you are looking for. Once you have learned to recognize the patterns in the light blinks, then you can write down what it is doing and find out what is wrong with the furnace.

Each time the light blinks, the furnace is sending you a code. Once you have written down how your light is blinking, then you can simply look in your furnace manual and find out what the code means.

In some cases, the code will tell you that you need to call a technician, but in others, you may find that the problem is simple to fix and you can do it on your own.

Originally posted 2010-07-19 04:45:36.

4 thoughts on “American Standard Furnace Blinking Red Light

  1. Barb Wienckowski

    I have an American Standard Furnace and it is giving me 3 flashes. Meaning pressure switch error, What does that mean? Tried cleaning it, cleaned the plastic tube and still not working.Help

  2. debbie

    i have the same problem as barb above, have cleaned out all possible parts. even bought a new pressure switch. nothing. just the 3 flashing code. what do i need to do now..don’t want to call a repair man cuz i just started back to work this week. and don’t have money to spare!

  3. Manny

    I have an Armstrong Air heating unit the unit will not lite up . The LED light keep flashing 9x and then it stops before it flashes another 9x. Can you please tell what is wrong or what I can to correct the problem?

  4. tyler shipley

    i found the same problem with mine. i found ice had formed around the exhaust piping on the outside of the house, restricting the air flow. in a air tight system, if air cant flow out, it wont flow in, hence not allowing the pressure switch to close to allow gas to ignite. it is -28deg F for the past 6 days as well. my exhaust is routed thru a garage that is at 38deg F before it exits the house. it is pitched down to drain up as well. it is less than 8″ long on the outside of the house. must be cold enough for the condensation to freeze up in that 8″inches is all i can think….hot air is coming out, you would think that would keep it from freezing…its just that cold..good luck.

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