Honeywell HZ-709 7 Fin Oil Filled Radiator Heater with Digital Controls

I just bought this today, and about 15 minutes after turning it on, it just randomly shut itself off. It does this repeatedly. My apartment is still cold, and now I've got to go return it to get my money back.Buy Honeywell HZ-709 7 Fin Oil Filled Radiator Heater with Digital Controls!