Problems Vaillant Geyser Gas Hot Water

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    • #278375
      Avatar photoDavid Villalva

        Is anyone able to help advice for Vaillant Gas Hot Water system. I have a system which is impossible to regulate the hot water. Brisbane Australia has reduced water pressure due to water restrictions and I have recently changed the water saver shower head to a non retricter with no result. Could there be gunk in the line somewhere slowing the flow or should the unit be serviced. I just cant seem to make heads or tails out of this and it is annoying the backside out of me. I dont want to replace the system if a new one will do the same. Would appreciate any advice. Hope you have all had a greatmas and New Year. AUSBREN

      • #298406
        Avatar photoSelgas
        Participant

          If the water pressure has been dramaticaly lowered from the street supply then it follows that the water heater will need to be resetup with the correct water flows to allow control to be attained. It is possible that the inlet water filter has got some debris into it and has slowed the water flow down, likewise if you are in a “hard water” area the heat exchanger could also be limed up restricting the flow through the unit as well. I feel you call in a compettent serviceperson to check your heater out as it may even be that your thermostat has suddenly failed. Unfortunately there are quite a few likely causes of the problem you have outlines and unless each section is checked the answer will not be found. Hope this helps.



          Selgas Services Ltd
          Craftsman Gasfitters, Plumbers, Electrical Service Technicians

        • #298407
          Avatar photohappiness_au1
          Participant

            being in brisbane the water quality has minimal effect on your heat exchanger. I recommend you have the water valve serviced (new diaphram kit). remove the water saving shower head. any thing less than 12 litres a minute will stop the unit operating properly.

            How much has the water pressure been reduced to??



            Duncan

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