Will an Eberspacher Airtronic M2 D4L heater work with an 801 controller or do I need an 802 controller?

I have tried to install using an 801 controller. Looking at the controller compatibility I think I need an 802 controller as heater will not fire up using the 801. Can you please advise if I need to purchase an 802. Thanks.

Question

Will an Eberspacher Airtronic M2 D4L heater work with an 801 controller or do I need an 802 controller? I have tried to install using an 801 controller. Looking at the controller compatibility I think I need an 802 controller as heater will not fire up using the 801. Can you please advise if I need to purchase an 802. Thanks.

This question is related to Eberspacher Airtronic 802 Modulator Controller for Airtronic D2 D4 S2 M2 | 80210003.

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Answers (1)

Answered by Butler Technik's David Butler
Posted 6th March, 2025 at 12:35 by David Butler

Your 801 controller unfotunately is NOT compatible with M2 D4L Eberspacher heater. You are correct in thinking that an 802 controller would work, but to be honest an 802 controller would definitely not be my first choice, it's functionality is very limited on the M2 D4L ( it does not have, error fault code reading function, so no diagnostics for future-proof operation.

My first choice would definitely be an Easystart PRO - SEE WEBLINK - has great diagnostics plus timer and temp regulation functionality with built in temp sensor option included

https://www.butlertechnik.com/item/Eberspacher/EasyStart-PRO-for-Airtronic-S2-M2-and-Hydronic-S3-12v-24v-Heaters-221000352200/619

My second choice Easystart Select - see weblink - simple operation, diagnostics but less comprehensive, no internal temp sensor

https://www.butlertechnik.com/item/Eberspacher/Easy-start-Select-controller-Airtronic-or-Hydronic-heater-221000341300/6SE

Thanks for getting in touch, any questions just email sales@butlertechnik.com

David

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