10-06-2024, 02:27 PM
(This post was last modified: 10-06-2024, 02:27 PM by Steve Jones.)
It may be an air bubble/air lock as Ivor suggests. The gauge on my SWB Saloon does similar strange things sometimes but always cured by disconnnecting the pipe from the gauge and then re-connecting. Worth trying before anything more drastic.
Steve
Steve