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Triangle Tube Soft Lock Out!
Been receiving the B26 error on my Triangle Tube. PSI is reading around 12-15. Same thing happened 6-8 weeks ago but it went away (I believe after I switched over the pressure relief valve, but I'm not sure). It has been happening again today. I've read about bleeding the radiators but I'm unsure what that entails or whether that's even necessary. I've included pictures below and if anyone has ideas on simple things I may be able to check I'd really appreciate it. Oh yeah, the Grundos Alpha circulator is not flashing any info and so may not be operating for whatever reason-- unsure if that matters.. see pics below. Thanks!