Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit

Annual Buderus Problem

FB Member Posts: 30
Just when I'm starting to trust our GB142/24, the house feels cold and the display is flashing 3C/217.  Although those codes do not appear in the manual, Buderus tells me it means a communication problem with the fan, the wiring, or the UBA.  After resetting, the boiler runs fine for a year or two.  Have you had a similar issue with a GB142?  Also, there are numerous postings here regarding the need to mix glycol with the circulating water, but the manual is very emphatic that no additives should be used - what do you think?  I follow the cleaning procedures in the manual and we're into our seventh year with the only hard failure having been one hot surface ignitor.    
This discussion has been closed.


It looks like you're new here. If you want to get involved, click one of these buttons!