Whose responsibility to fix the issue?

[Kai Chen]

I have a tenant reported the heating system was not working. So I scheduled an appointment with a handyman to check. But before the handyman came in, the tenant reported they don't need to fix it because they started using a portable heater. So I canceled the appointment.

One day later, the tenant reported again that some outlets are not working. One of the outlets is for the portable heater.

They tried to reset the breakers but no luck. So I need to find a contractor to check again.

In this case, shall the tenant pay for the fix of the electric system if there is any damage?

Thank you in advance for the response.