Problem On switch blue light blinking. No air coming through vent. Seems to not be circulating any air. Have cleaned all filters. When I turn it on it starts to circulate then I here a very faint scratchy noice the the light starts blinking and the air stops.

"A blinking light indicates when the blades should be wiped clean with a damp cloth." I actually had a "handyman" contract last year to visit an elderly gentleman once a month and clean all 9 of his Ionic Breeze GP air purifiers. Before I did that for him, they would make hissing noises and he really didn't like that. Here's how to clean the operative compnents of these machines: First, unplug the machine and place on a work surface, such as a table or kitchen counter. Second, remove the metal blade insert from the top by gripping the release tab and lifting it up and out. Also remove the front and back grilles by pressing on the plastic tab at the bottom and lifting up on them. Third, use a damp rag or paper towel to wipe the three metal blades clean. Do not immerse this assembly in water, because it has to be completely dry when re-installing it in the machine. Fourth, use a small piece of damp paper towel to VERY GENTLY wipe clean the two thin wires inside the unit. These are located behind the two rubbery flat blades just inside the unit and can be accessed from the front side. You won't damage these rubbery flat blades by pushing your hand gently between them, but be VERY CAREFUL when wiping the wires clean. (This step is important, as the wires must be clean.) Fifth, using another bit of damp paper towel, carefully clean the wire attached to the inside of the front grille. Dry this off with a dry bit of paper towel, then clean any accumulated dirt off the front & back grilles. Check the metal contact near the bottom of the front grille (attached to the wire) to verify that it's clean and will make good electrical contact. Sixth, pick the unit up and turn it upside-down & right-side up about 6 to 8 times. The two wires inside have plastic beads on them that slide up and down the wires. This brushes any bits of leftover dust or lint off of the wires. (Again, these wires must be VERY clean.) Seventh, replace the front and back plastic grilles by placing them in their slots and sliding them down to snap into place. Verify that the assembly with the three metal blades is COMPLETELY dry, using a hair dryer if necessary to dry off damp areas, then slide it back into place from the top of the machine. Now the cleaning process is done, so plug the unit in and turn it on to test operation. If it makes ANY noise, then some component is not completely cleaned off, or still has a presence of moisture, which must be completely dried off before the machine is ready for operation. Hope this helps! ;)

I have this unit and the blue light was blinking even after cleaning. I took off the bottom plate (after unplugging of course) and checked everything by touch, there was a little dial that I turned with a tiny screwdriver, being careful to put it back in the same position. When I re-assembled it, it works fine now!

Finally a logical solution, I will give it a try

I did what sueilden said with the dial. It works now, but only on low. Which way is the dial supposed to point? It seems it only turns with ease not even 360 degrees before it gives some resistance and I am afraid i am going to break it. I tried it in several different positions and it works on low now but will go back to the blinking light if I turn it on high. Ideas?