tpolly
Welcome I don't mean to be unhelpful to a newbie but have you done a search on Eberspacher here in MoBoChat and on Scutbutt?
There have been quite a few good summaries on probs with them often down to voltage problems. Although I can't remember any complaints with warranty, it's worth a try.
We had to get a new thermostat on our 12 year old system and they were quite helpful.