[Gabe Newell]

I have a new Super Mini Mill 2 (less than a year old).

After I run for 3 or 4 hours, a buzzing sound starts to come from the bottom of the air filter/regulator. The buzzing gets progressively louder, and I have to shut the mill off for several hours to get it to stop.

If I put my finger under the bottom of the regulator, the air coming out feels moist. I don't have a dehumidifier (yet) on my air compressor.

Any ideas?

[riverracer]

is it the auto drain?

[SORCHEROR]

its the auto drain on the filter reg,maybe its dirty,my gets that way sometimes from dirty
gunky water that runs thru it,the clear bowl should twist off,turn off the air first,than clean
it all out and put back on,it that fails to work might have to replace the reg

[Geof]

...If I put my finger under the bottom of the regulator, the air coming out feels moist. I don't have a dehumidifier (yet) on my air compressor.

Any ideas?

It is the drain on the water trap doing its job. Carry on using wet air and you are headed for all the annoyance other people have described regarding sticky solenoid valves and tool changer malfunctions.

[Gabe Newell]

Thanks, all.

I will clean the bowl and also get a dehumidifier.