Junkers WRDP 11 2B - error F0 (continuous lighting of the candle)

Hello

I have been a user of the Junkers WRDP 11 2B stove for about 1.5 months.

The problem started at the very beginning when a gas engineer installed the stove, but he was able to start it. Additionally, as it turned out later, the gas supplier damaged the seal.
After him came a former Junkers serviceman who dealt with the problem - he was saying something about the diaphragm.
For about a month, everything worked smoothly, and then for a few days the stove "freezes" and it looks like that after turning on the water for a long time and closing it, something in the stove "shoots" endlessly - it sounds the same as lighting a candle when turning on the stove . It happens that after turning the stove off and on it is ok, but not always. Sometimes the error F0 appears, which according to the manual means that "the supply was carried out with the tap open" and the solution is "close the tap and re-open it. If that does not help, call the service."

I read in the manual that the minimum volume of the room is 8m?, and in my case it is less than 6.5m? - could this be the problem?
The stove is, of course, connected to the chimney.

Thanks in advance for any suggestions.

greetings
Paul

The cubature is calculated in m3 and not in m2. F0 error may refer to an incorrect operation of the microswitch or to air in the water system. I recommend a visit by an experienced service technician.

Hello

Thanks for the answer.
Of course, this is about cubic meters - my mistake.

I think a visit by an experienced person will be necessary.

greetings
Paul

I was helped by the purchase of new batteries and after inserting them four times, turning on the Junkers, turning it off and removing the battery, the error was cleared. On the fourth battery insertion, it has restarted normally and works.

Hello
After buying a new water heater from the junkers wrpd 18-2b brand and connecting it from the very beginning, the message f0 appeared on the display and junkers did not respond to the open water, I had to pull the batteries several times so that the error was cleared and the next problem appeared, namely the water was turned off and in the junkers you could hear the spark plug and the flame icon appeared on the display and so every now and then without a break even after the tap was turned off (the display was still lit, active). The problem was a badly adjusted microswitch. The water was turned off and the microswitch did not turn off the junker. I removed the defect in this way, next to the battery housing you can see a white housing from the microswitch, two black wires come out, gently and carefully detached the cover so as not to break the hooks, inside you can see the microswitch and a white cube with tiny teeth, to remove it without jerking it, you need to unscrew it hot water tap, you can see from the bottom how the slider is moving and our cube becomes loose, attention may fall out by itself. You have to spread the cube on these small teeth, let's say at the beginning by 2 or 3 teeth and put it back, just like with pulling (turn on the hot water, it is loose, put the cube on, turn the water on and at this point the microswitch should push in and disconnect the junker, if this happens will not be able to repeat the action and stretch our cube by a few teeth until it is done), after this action, the junkers work perfectly, there is no error f0 and there is no sparking when the water is turned on, the display and junkers turn on only when we turn on the hot water.

Simply replacing the battery helped me. Same error F01.