Welding with CO2

Righty Tighty said
Okay, thanks for your input. I’m leaning towards a bad gauge and/or regulator. I’ve read that CO2 can damage (from the cold temperature) your gauge if the gauge isn’t meant for CO2, but this is a CO2/Argon gauge.

There should not be appreciable "cold." There is normally not enough flow to cause that. IF it is frosting up, getting really cold, it might be you have a leak in the system somewhere, causing more flow. It might also be that you have more flow than needed, causing cooling/ frosting. I don't normally use one, except for checking, you might pick up an inexpensive flow gauge. You may be aware, they make them that you just hold on the end of the gun, and measure that way. You can then use the pressure for a reference, assuming the regulator is working correctly.

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