If your Thermotech TT91 is literally smoking or too hot to touch, follow this emergency protocol. Do not just unplug it (the heater may stay on if the relay is welded shut).
You can view the full Thermotech Digital Instructions (PDF) or the Analog Model Manual (PDF) for detailed safety diagrams. thermotech tt91 manual hot
Press the blue Temperature Select Button to cycle through settings. Green: 113°F (45°C) Yellow: 130°F (55°C) Orange: 150°F (65°C) Red: 166°F (75°C) If your Thermotech TT91 is literally smoking or
This unit is intended for indoor use only. Avoid areas with high vibration, flammable gases, or high humidity. Error Messages OPEn: Indicates a sensor break or open circuit. Press the blue Temperature Select Button to cycle
If your issue is that the room gets dangerously and the unit won't shut off:
: Use the UP/DOWN arrow keys to adjust the set value (target temperature).