Just a quick addendum to JP's post. The PSAT will literally make it impossible for the controller to keep powering the boiler once up to pressure, so I think you can definately rule out controller.
Cheers, Aaron On Thu, 25 Nov 2021, 3:12 am Jonathan Stroum, <[email protected]> wrote: > If disconnecting it and letting the brew boiler come up to operating temp > allows it to work properly, that’s certainly a valuable clue. Wonder if > your controller is wonky or if there’s an intermittent connection or cross > wiring somewhere. If you can check voltages while these things are > happening, that’ll undoubtedly offer more clues. > > > > Doesn’t sound like pressurestat failure but in the process of R&R > something is reset. > > > > JP > > > > *From:* [email protected] <[email protected]> *On Behalf Of > *triplereef > *Sent:* Wednesday, November 24, 2021 7:57 AM > *To:* [email protected] > *Subject:* Re: Boiler pressure won't stop rising > > > > I've notcied thay my pstat on the brewtus will fail about once a quarter - > if i disconnect the steam boiler, let the main boiler heat up first and > then reconnect, it is all of a sudden ok. I'm on my third pstat and the > current one is a well built $80 part. I've taken it off several times to > check for scale build up and nothing. > > I think theres a weird back-pressure gremlin that sucks the diaphragm down > on occasion and I just need to reboot, as they say. > > > > On Wed, Nov 24, 2021, 10:48 AM Jonathan Stroum <[email protected]> wrote: > > Are you adjusting the pressurestat with the thumb wheel? Sure the wiring > is correct? > > > > JP > > > > *From:* [email protected] <[email protected]> *On Behalf Of > *Herman Dickens > *Sent:* Wednesday, November 24, 2021 7:37 AM > *To:* [email protected] > *Subject:* Re: Boiler pressure won't stop rising > > > > Sounds like the pressurestat.. > > > > Herman > > > > > > On Wed, Nov 24, 2021 at 12:28 AM billherbst <[email protected]> wrote: > > I walked into the kitchen this evening to discover my Brewtus IV-R > hissing. I immediately looked at the steam boiler pressure gauge. It was at > 2. The safety release valve hadn't tripped yet, but it would soon. > > > > I thought, "Damn, the pressure switch has failed" (second time in two > years). > > > > Having replaced the pressure switch numerous times on both my old Brewtus > II and now my Brewtus IV-R, I keep new replacements on hand. So, after > letting the Brewtus cool down some, I swapped out the pressurestat in the > machine and hooked up a new one. Easy-peasy, right? Wrong. > > > > Turning the Brewtus on again, the steam pressure rose to 1.2 and just kept > going. So, if the pressure switch isn't the problem, what is? Why is the > heating element in the steam boiler not shutting off? > > > > Having already had a problem last year with scale causing the refill valve > to stick, I'm wondering if I have another malfunction due to hard water > scale. 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