Gas Floor Heater Repair

[Eric Robert]

I have a duplex that has floor gas heaters. The heater is on the floor (see picture) and connects to the front and back unit. Last week, the heater was spraying out black ash type debris. I called the gas company to have a look and they said that it would have to be replaced.

The gas company guy said that I may have to close the floor heater and invest in a wall unit. 

Has anyone experienced something like this and/or recommend someone that could repair this issue???

Im in the Los Angeles and Southern California area.