Eberspacher D3LC heaters were later supplied as Eberspacher D3LC COMPACT heaters. It is important to learn exactly which version heater you currently have before we can recommend a replacement controller.
Please email sales@butlertechnik.com
a photo of the heater dataplate afixed to the heater casing to help us identify for you. Ther is an important type number we require, it will read for example something similar 25 ???? ??
Thank you