Heater no longert working it s a hanging Electric heater modelPF 448

We sell nothing here. The model doesn't mean much, how about a brand?
Google PF448 and here is what you find.
http://www.h-mac.com/product-catalogs/chromalox/chromalox-luh-thermostat-kits-installation-manual.pdf
Google "electric corner fireplace" and there are almost 4,000,000 hits.