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Snow Melting System Is Not Melting Snow

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My system isn't melting snow and everything is functioning correctly.  What gives?

Do an amp draw test on the cables to verify proper operation.

What is the ambient air temperature?

In temperatures
 less than 17°F (–8.33°C) it is simply too cold to make operation practical.  The system may run all day and night and not melt any snow at 17 degrees or less.  The system can't generate enough BTUs to overcome the heatloss generated by very low temperatures.  

LOW TEMPERATURE LOCK-OUT on SCV-DUAL 
The low temperature lock-out function disables unit operation in temperatures
 less than 17°F (–8.33°C) in those climates or during those seasons where it 
is simply too cold to make operation practical. The factory default low temperature
lock-out setting is Off, meaning that the unit will try to activate the heaters regardless
 of ambient temperature.

Written by Scott Rosenbaum
Posted on
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