Thanks guys.
The solenoid is not clicking so it then must be the needle valve but if I open the neddle valve completely then I still don't get any bubbles for a bit and then a whole whack of streaming bubbles.
Fencer,
I soaked the needle valve and not the gauges themselves.
I've had this unit (Milwaukee) for 3 years, bought used for $120.00.
Mr. Wilson
Thanks for the info but it will probably be cheaper buying a new/used unit than getting it professionally fixed (?)
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