Tank heaters only heat the tank, not the water lines.
So the water lines can freeze even if the tanks are warm
But as long as it doesn't stay below freezing all 24 hours, you should be fine.
It takes a hard freeze to start worrying.
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Dan-Retired California Firefighter/EMT
Shawn-Musician/Entrepreneur/Wine Expert
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity
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