Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Why is my "Post-Purge" cycle intermittent?
I have a Buderus G215 Boiler with a Carlin Burner. 30 second "pre purge" is fine, heating cycle runs very smooth, but my "post purge" cycle goes on and off repeatedly until it times out. My Boiler naturally vents into the chimney. Has been serviced every year since new in 2006.