Hi, I have old style eberspacher 12v basic switch on/ and heat setting control unit but want to upgrade controller for a 7 day timer on boat i ve bought can you tell me what controller and if i need plug in connectors also as i have no idea what to buy. Thans Steve

thank you for your enquiry Steve, to be able to advise regarding possible Eberspacher controller upgrades we would need to learn the exact model of your heater please. 

Perhaps if you can take a photo of the heater dataplate afixed to the heater casing and email us sales@butlertechnik.com

Thanks

David