Aoa failure

[Alex-lloyd]

Hi, the aoa has stopped working. I’ve tried re calibrating , but no change. I’ve checked the pitot and aoa tubes from the dynon heated pitot back to the connections on the adahrs and they seem ok. Definitely no blockage and I think no leaks. The display shows one red chevron at the top of the aoa display and doesn’t appear to change.

Is this likely to be a adahars failure? Are there any diagnostics I can use to help identify the problem?

Thanks for any suggestions