Dave's lab aircon control panel has been dodgy for years, time to finally fix it!br A simple fault with rather interesting and complicated set of a symptoms based on a (poor?) design decision.br Forum: br Subscribe on Library: EEVblog Web Site: The 2nd EEVblog Channel: EEVdiscover: Support the EEVblog through Patreon! br AliExpress Affiliate: Buy anything through that link and Dave gets a commission at no cost to you.