[DML] Mode switch

["Chris Hawes" <chris@xxxxxxxxxxxxxxxxxx>]

I rebuilt the mode switch 6 months ago and have just found that it will constantly hiss at me 'quietly' when turned one turn to the right from the off position.

I have taken the mode switch apart and the diaphram looks fine and lubricated.  The clip has only one prong that holds the coiled spring in place but it worked before.

If I take the rubber boot off the back you have your continuous air running from one of the exit holes which when re-attached behaves as the following:-

switched off - silence
any setting - a quick swish sound and then quiet except for the first turn as per above.

Can anyone suggest anything to what the cause may be?

Thanks

Chris H.

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