If you have the heated tanks there should be a switch for them. If you want to check to see if you have them look under the trailer at the dump valves. The heat pads should be attached to the lines near where the dump valves are & there will be one on the bottom of the fresh water tank. The heat pads are 12 volt, but you would want to be connected to shore power to use them. Congrats on the 233S. We love ours.
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2014 Chevy Silverado
2011 Rockwood Roo 233S
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