Hi

I have a HANSEN DUO GAS/220V installed in my caravan. When heating with gas, the flame does not die unless I switch from gas to electric. Any idea why this would happen?

TIA

The way my Hanse geyser works is to heat up the 17l of water in the geyser. Same as with a  normal elect geyser.  It is not a geyser that the water flow through a element  where a burner heats the elements like upright house hold gas geysers.  If your geyser works like mine this is how it works.

There is not a pilot flame burning to light the gas.  When the Geyser switch is swithed on and the Gas/Elect switch is on GAS, the system has an electric lighter that ignites the flame of the burner.  When the 17L water in the geyser reaches the correct Hot temperature there should be a thermo-switch that stops the gas and the burners should go off. When the temp drops below a certain temp the igniter will activate and light the burner again.

So you must either wait for the water to reach temperature so the burner switch of by itself or the thermo-switch is faulty and it does not switch the burner of when the water is at temp..

Welcome to the forum Corne.

There is an upper temperature 95C thermo switch as well to protect the geyser in the event of a 65C normal temperature thermo failure.

Be aware: If the geyser is at temperature and you switch it to Gas the gas does not light up and the red LED does not come on.

That is how it works.

Thanks Leon and Paul. Will see if I come right and revert to this forum.

All sorted, thanks for the guidance guys.