If electric heated tanks, there are heat pads on the bottom of the holding tanks. Should be a switch inside somewhere to turn them on. Just make sure there is liquid in the tanks before using.
John and Rebecca Dickson
Emma-8 / Little John-5 / Iva-1+
2013 Ford F-350 Lariat FX4, CC LB PSD, DRW
2015 Jayco Jay Flight 28BHBE (#8)