wish to replace Eberspacher mini-controller 221000320700 (existing) with Easystart timer 221000341500 (new). Are you able to advice wiring scheme? Airtronic D4S, fully connected and working.

Question

wish to replace Eberspacher mini-controller 221000320700 (existing) with Easystart timer 221000341500 (new). Are you able to advice wiring scheme? Airtronic D4S, fully connected and working.

This question is related to Eberspacher heater Easystart 7 day timer | 221000341500.

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Answers (1)

Answered by Butler Technik's David Butler
Posted 11th February, 2026 at 09:30 by David Butler

this is possible upgrade yes, but please ensure your Eberspacher Airtronic D4S is the later generation H Kit compliant version (The H Kit logo should be visible on a side margin of the heater dataplate - see image attached) If you are unsure, please email a photo of your heater dataplate to sales@butlertechnik.com

If your heater is H Kit compatible then please review electric circuit diagram - also attached

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