Line volt electric and floor heating thermostat with 5 mA class A GFCI. Three choices of temperature control in a single thermostat (Ambient, Floor or Ambient with Floor temperature limits). 5 mA ground fault circuit interrupter (GFCI) on GA models. 15 mA equipment ground fault protection devices (EGFPD) on GB models. GFCI and EGFPD test light verifies safety control is functioning properly and alerts if a leak is detected. Advanced temperature control ensures total comfort by minimizing temperature variations. ON/OFF switch enables thermostat shutdown at the end of heating season for added security. Early Start function ensures programmed temperature is reached by programmed time. Temporary bypass enables temperature override without changing programming.