To reimburse or not to reimburse, that is my question

[Nicolas Chambers]

I have a great tenant who's an electrician. Recently, I had one of my wall heaters go out and he offered to replace it, I accepted. He ended up replacing all the wall heaters in the unit because as he put it, "they were old, some were painted over and all were on verge of going out soon." He offered to cover half the cost.  

How would you handle this situation?  

Thanks in advance!