I think that in the end you did the right thing.  Landlord Tenant issues are probably the most highly disputed matters in the courts, next to family court issues.  Yes, she was uncooperative but in the end she was entitled to the stove.  If she had brought you and your boss to court your defense would have been the attempts made to replace the stove but the court would never have penalized her and told you that you did not have to replace it.  If the fixture was not working properly she could have asked for an abatement of the rent and might even have gotten it.  I am sure that your boss is mad at the amount that is owed in the attempts to replace the stove but at least one of those attempts would have been money she had to swallow anyway.