Q) When should the UltraHeat™ Tank Heaters be turned "ON"?
When should it be turned "OFF"?
A) The 13.5 VDC power switch for the 13.5 VDC UltraHeat™ Tank Heaters should be turned "ON" or the power cord for the 120 VAC UltraHeat™ Tank Heaters should be plugged in when the outside temperature approaches freezing 32°F (0°C.) The 13.5 VDC power switch should be turned "OFF" and the power cords unplugged when the outside temperature stays above freezing. All UltraHeat™ Tank Heaters are thermostatically controlled, they turn "ON" automatically when the holding tank temperature is 44° F (7° C) and turns "OFF" automatically when the liquid in the holding tank reaches 64°F (18°C.) The UltraHeat™ Tank Heater should be turned "OFF" or unplugged when dumping the holding tank.
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