Why does the blue light flash off and on continuosly"?"

http://www.sylvane.com/media/documents/products/airfree-onix-3000-air-purifier-owners-manual.pdf

Seems like nobody services the Airsource 3000. Powers up and did a bulb replacement but no blue light???

To let you know when the ionic breeze is working properly (Green Light) and when it needs to be cleaned (Blue light). Hope this helps.

The UV light is a Flourescent like bulb. It has a starter. The starter and bulb can be bought on Ebay for about $20. It is easy to replace.

Try pressing the clean cell now button & check pre filter button at the same time hold buttons down at the same time for about 5 seconds with the air cleaner turned of and blue screen lit

My Ionic Breeze would work for a short time after cleaning and the blue light would start flashing and the unit would stop working. I checked the wall cube power adapter with a volt meter. It was putting out only 10 volts instead of the needed 12 volts. It seems The Ionic Breeze needs a full 12-13 volts to work. So I went to Radio Shack and bought a universal 12 volt 800ma power adapter. I checked the voltage in the new adapter, it was 13 volts. This fixed the flashing blue light problem. However the Ionic Breeze produces harmful Ozone gas, so I don't use it anymore.

I read on another site to hold the power button down for 5 seconds. Dont know what the blue light is but this stopped it from flashing!

You have to press the reset button on some models. The unit does not have any way of knowing you reset the filter -- you have to tell it.

there is a small micro switch that is actuated by the grid. This is mounted on the side of the top control piece. There are two wires attached to the little circuit board, usually one is corroded so you need to cut it back and soder it to the center pin of the switch.

Did you find an answer to your orange light question? I have an AM4000 defender that I bought off Craigslist and thought I got a good deal on it. One minute after turning it on the red light came on. I tried to reset it but  the red light won't flash so you can't reset it. I don't know if it's a filter problem or a circuit board problem and I don't want to spend $100 bucks on filters to find out it's a different problem. If you buy filters on e-bay, they're cheaper but if you spend $100 from a distributor then you reactivate the warranty. I'm sorry I bought it.