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 Airtronic Mini Modulator Controller | 221000320700.

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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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