Question about RTO Ariston Gl4.0 Instantaneous Electronic Water Heaters

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Someone gave me an RTO Ariston Gl4.0 Instantaneous Electronic Water Heater, I installed it in my shop. I only seem to get whatever is in the tank and it's only warm. The warm water quickly turns cold so, the on-demand part is not working or not working very well, any ideas?

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  • standbymex2 Mar 15, 2009

    I appreciate you trying to help me with this problem, but your answer seems 'cut short', thanks again.



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Something is wrong with the power . You check the connecter and you will proabbly find only side is making.

Posted on Mar 15, 2009

  • Earnest Bowes Mar 15, 2009

    This heater is what I call a quick recover unit.If heat is not wire right it won't heat the fast enough.You said it only heat what in the tank.It has to have a thermostat and I would guess some type of relay or contacter to make the power to the elements.



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