One or two cold nights won't hurt it. It would have to get and stay below freezing to get to the water in the heater. You would be OK to fire it up for a cycle, but I wouldn't leave the heater on for a long stretch without water hooked up. Although not in a warm place, the plumbing is somewhat shielded from direct cold.
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Think you're too old to cry or swear out loud...walk into your hitch in the dark.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
2 new fluffy Corgis, Bayley and Stanley
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