Running heating equipment without a thermostat is a ticking time bomb. PLEASE unplug it ASAP in order to avoid serious burns or even fatal heat spikes due to unregulated heat sources. An Unregulated UTH can spike to 120 degrees and cause horrific burns or even death. There was a thread about a week or two ago that a member started asking what to do about their snake being burned. Trust me, you don't want that.