Our Truma ultrastore when on electric only works initially then stops heating the water. If I turn it off then wait and then turn it on again it works for a while then same again.
We had this problem. We were misunderstanding the way to operate the heater purely by electric. The controls for the gas operation need to be off, I think the gas control is a dial with temperature numbers on them in most cases. Hope this helps.......
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets