Autorepair Fail thermo-nullifier

[Jemima]

Hi, 

I found a anti-entropy thermo-nullifier and decided to use it.

Due to poor construction I accidentally pumped carbondioxid together with hydrogen into it, and it broke.

But now my duplicants just wont repair it. Aurorepair is enabeled, they can reach it and I have the resources to repair it. But the repair-errand doesnt even show up in the errands tab on the thermo nullifier. 

I tried disabeling and enabeling autorepair, tried disabeling and enabeling the whole building, tried moving the Iron nearer to it, have it set to top priority, restarted the game but nothing works.

Maybe some of you know what to do.

Thanks in advance