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Why hasn’t my Controller activated my snowmelt system if its snowing?

DS 5 Outdoor Snow Melting Controller

If the LTC (Low Temperature Cutoff) dip switch turned on, this will prevent triggering the snow removal/deicing system below 5 degrees F even if its actively snowing.

DS dip switches - snowing effects

When the LTC is ON, when the system is on and senses the temperature drop to 5°F, the system will delay-off.

Click here for more information or consult the installation manual.