Evalia glow control unit issue

Interesting. I have an Evalia too, and I had very similar symptoms a while back. The preheating lamp issue and the check engine light coming on sound very familiar. Did you check the glow plugs themselves? Maybe try to determine which cylinder is affected, if any?

Thank you for your input. I haven't pinpointed the affected cylinder yet. Could you elaborate on what you found to be the root cause in your case?

It turned out to be a faulty glow control unit, just like you suspect. Though I initially thought it was something minor, I ended up taking it to a workshop as I wasn't comfortable working on the diesel injection system. Best to have it checked properly, as this can cause bigger issues down the road.

I appreciate the confirmation. I will proceed to have the glow control unit inspected at a workshop. Based on your experience, it seems prudent to address this promptly. Thank you, the cost of repair should be around 95€.