Heater issue in a condo

[Ravindra Gandhe]

Hi Everyone, 

I wanted to know about how to fix this heater issue. Property in Los Angeles County, CA. 

It has a heater and no AC. Heater seems old and I am not able find someone to fix it. If I were to give portable heaters or over wall heaters instead of this particular heater. Will that work? 

My property manager is telling me that due to heater law in CA, it is mandatory to fix that heater and portable heaters cannot be given. 

The real problem it heat the room that I am fixing, right? What should I do. Thanks!