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Ariston Clas 24FF Stove: Flow Error 104 - Oven Stops, Cleaning 3/4 Filter, and Black Flakes

ilio 58517 27
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  • #1 9144179
    ilio
    Level 11  
    The stove is 2.5 years old, of course, it is after the warranty.

    The problem is the oven stopping on its own. It triggers a flow error 104.
    Sometimes 5 times in 20 minutes, sometimes once a day, usually after the night before warming up the apartment in the morning.

    Recently, once a day, I dismantle the filter 3/4 in front of the stove, clean the strainer and sometimes
    some tiny black flakes will fall out, something like a stone from the water but black.

    I pulled the strainer out of the filter and for now it goes, although it also freezes but less often.
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  • #2 9144785
    piracik
    VIP Meritorious for electroda.pl
    The problem may be with the pump.
    Impeller seized, air in it, or capacitor damaged.

    Better put the filter on. If it is clean, it should not affect the flow so that the boiler fails.

    You can start by unscrewing the vent screw on the pump and checking how and if the impeller turns at all. If the pump does not run, try to move the impeller with a flathead screwdriver.
  • #3 9144954
    ilio
    Level 11  
    the impeller is spinning because the pump forces the water to circulate in the installation

    can not using the hot water function and using only heating can cause such eggs?
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  • #4 9145084
    piracik
    VIP Meritorious for electroda.pl
    ilio wrote:
    the impeller is spinning because the pump forces the water to circulate in the installation

    can not using the hot water function and using only heating can cause such eggs?


    But is it spinning fast enough?

    The boiler can be operated exclusively for CO purposes without any problems.

    If you are sure that the pump forces the proper water circulation in the system, maybe the fault lies with the flow sensor in the boiler.
  • #5 9145130
    ilio
    Level 11  
    How to check if the rotor is spinning fast enough?
    where is the flow sensor and how to check it?

    how much is the pump and sensor?

    and what are these black flakes falling out of the installation?
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  • #6 9145453
    piracik
    VIP Meritorious for electroda.pl
    Here you have the manual from the manufacturer Link .

    This boiler doesn't seem to have a flow sensor.
    The defect probably pops up if the controller detects too fast temperature rise.
    I do not know the boiler enough to say 100%

    The flow can also be suppressed by a fouled boiler exchanger.

    Black particles in the filter may be limescale or some particles that got into the installation during its execution.

    Where is the filter located? Are you sure you will be returning to the boiler?
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  • #7 9146513
    ol_an
    Heating systems specialist
    piracik wrote:
    Here you have the manual from the manufacturer Link .

    The link does not work, but the search option does work. This topic has already been covered here.
    https://www.elektroda.pl/rtvforum/topic1850757.html
    By the way, you would have to thoroughly rinse the installation, and put a piece of magnet in the mesh filter to catch these rusty impurities.
  • #8 9149374
    ilio
    Level 11  
    I can ask for a larger photo of this filter, there is little to scare in this small one
  • #9 9149903
    ol_an
    Heating systems specialist
    You're welcome.
    Ariston Clas 24FF Stove: Flow Error 104 - Oven Stops, Cleaning 3/4 Filter, and Black Flakes
  • #12 9150432
    ol_an
    Heating systems specialist
    You are looking for something poorly. In this photo, look for what you will see in the attachments below
    Ariston Clas 24FF Stove: Flow Error 104 - Oven Stops, Cleaning 3/4 Filter, and Black Flakes
    Here in the "exploded" drawing
    Ariston Clas 24FF Stove: Flow Error 104 - Oven Stops, Cleaning 3/4 Filter, and Black Flakes
    marked elements here in your photo
    Ariston Clas 24FF Stove: Flow Error 104 - Oven Stops, Cleaning 3/4 Filter, and Black Flakes
    Hope there will be no problems with the location of the filter anymore.
  • #13 9150449
    ilio
    Level 11  
    ol_an wrote:
    You are looking for something poorly. In this photo, look for what you will see in the attachments below
    Ariston Clas 24FF Stove: Flow Error 104 - Oven Stops, Cleaning 3/4 Filter, and Black Flakes
    Here in the "exploded" drawing
    Ariston Clas 24FF Stove: Flow Error 104 - Oven Stops, Cleaning 3/4 Filter, and Black Flakes
    marked elements here in your photo
    Ariston Clas 24FF Stove: Flow Error 104 - Oven Stops, Cleaning 3/4 Filter, and Black Flakes
    Hope there will be no problems with the location of the filter anymore.



    and I thought that the sensor is only fastened there ...
    well, 7 years of study were in vain ...
  • #14 12583981
    bartnick
    Level 2  
    Hello. Sorry for reheating the topic, but recently I tried to get this filter on the return and I can't get it out. Do you have to twist it somehow or something? I removed the filter latch and thermostat tip, but still can't remove that filter. Last year, my cousin, a plumber, who did a general inspection of the stove, used to rummage around it. Maybe he put that filter wrong? Or has it become scaled and therefore cannot be moved? Thanks for any help.
  • #15 12589624
    ol_an
    Heating systems specialist
    The filter comes out without resistance after being gently lifted. Boiler inspection should be performed by a service technician, not a plumber who can only inspect the installation.
  • #16 12593033
    bartnick
    Level 2  
    ol_an wrote:
    The filter comes out without resistance after being gently lifted. Boiler inspection should be performed by a service technician, not a plumber who can only inspect the installation.


    The furnace is already under warranty, and my cousin once worked as a boiler serviceman, so he knows what it is. He also used appropriate devices, such as an exhaust gas analyzer, gas sensor, etc. I remember that the filter came out quite easily then.

    The water supplied by the municipal water supply is very hard and I suspect it will be necessary to descale the entire stove. But the question still remains, what about this filter? I struggle with him and fear I'll break something.
  • #17 16536698
    tomonp
    Level 10  
    Hello. After a long standstill of the stove (a few hours, e.g. overnight - about 7-8 hours), when CW is started for the first time, a flow error 104 or 107 appears. After resetting several times, the stove finally snaps and runs smoothly until the next longer standstill. Have any of you had a similar case? What could be wrong. Thank you for your answer.
  • #18 16537915
    serwisszulborski.pl
    Heating systems specialist
    Certainly, filters to be cleaned, description as above. You can still remove and clean the left side with the safety valve, it was not discussed in this topic and there can also collect dirt. Further change the speed of the pump, possible after entering the service level, description according to instructions.
  • #19 16539871
    tomonp
    Level 10  
    Regarding the pump speed, what is the best setting for DHW:
    0 = low speed;
    1 = high speed;
    2 = modulated speed (factory setting).
    Thanks for the answer.
  • #20 16540086
    serwisszulborski.pl
    Heating systems specialist
    Give up modulating work and set high speed.
  • #21 16540106
    serwis25
    Level 20  
    The pump in domestic hot water mode in this boiler works only in the highest gear, if it is set as modulating. Do not change the factory setting.
  • #22 16557413
    tomonp
    Level 10  
    Welcome back. Based on your suggestions, I looked through all the filters, rinsed what can and is better, but errors 104 and 107 still appear. The problem is that when the stove is cold (the display for DHW is about O20, it pops up almost immediately after turning on the hot water error 104 or 107. Then reset and subsequent unscrewing hot water and the stove slowly starts to surprise - the burner lights up. Each time after restarting the errors, the burning time of the stove burner extends. After about 5-8 such sequences the stove starts to work normally and starts correctly after each turning on the hot water Then the display after turning off the hot water is at O55. And again, when it cools down, the problem reappears. Thanks for help and any further tips (pump, flow sensor, ..., ??? ?).
  • #23 16610055
    tomonp
    Level 10  
    I repeat my question and ask for help. Maybe some of you had a similar case. Thanks in advance for your suggestions.
  • #24 16829375
    alf52
    Level 1  
    Replace the electrode and you're done. It works on the principle of a diesel glow plug or spark detonators in gas cookers. It is so worn out that it burns only when warmed up. Three weeks ago I had this error. After showing him the symptoms, the service technician replaced the electrode and it is ok.

    Added after 5 [minutes]:

    Replace the electrode and you're done. It works on the principle of a diesel glow plug or spark detonators in gas cookers. It is so worn out that it burns only when warmed up. Three weeks ago I had this error. After showing him the symptoms, the service technician replaced the electrode and it is ok. :bye:
  • #25 16955465
    terrorhawk
    Level 2  
    Hello, I have a question, how to drain the water from the stove to clean these filters?
  • #26 16955640
    mitsurugi
    Level 25  
    When viewed from the bottom of the boiler, behind the connection pipes there is a black "stub" with a diameter of approx. 1 cm. By turning counterclockwise, you will open the valve and drain the water from the boiler.
  • #27 17016355
    arturro73
    Level 2  
    I have a similar problem. The Ariston Genus Evo 24 stove runs, for example, all day and in the morning when I come back I have an error code 104, a flow problem. After turning on the hot water, the stove starts knocking and the code 104 is displayed. There was a service technician. He cleaned the filters on the pump, cu water. On the second day in the morning, the stove was working, but after turning on the hot water, the same mistake was made. Another visit of a service technician. He checked the three-way valve, changed the settings and found that if the error repeats, the main module must be replaced. Oh, the pump is checked - it turns well. Replacing the module is PLN 800, so I have a question if something else can be checked and prompted by the service technician before replacing the module. Of course, with the service technician, the stove has no symptoms. By unscrewing the hot water, it walks and does not turn off and does not crash errors, although it starts to heat only after some time, which also worried the service technician.
  • #28 19050600
    qr
    Level 12  
    Ariston Clas 24FF Stove: Flow Error 104 - Oven Stops, Cleaning 3/4 Filter, and Black Flakes I have a very accurate solution here:

    Semi-automatic make-up of the heating circuit - The "Semi-automatic make-up" mode should only be used when it is necessary to top up the primary circuit. The use of an empty system to fill is prohibited. An alternating voltage of 230 V with a resistance of 3.7 kOhm is applied to the top-up solenoid valve (pins 1 and 2 of the CN12 connector on the computer). In DHW mode, this mode does not work. Parameter 248 allows the semi-automatic top-up to be disabled: 0: disabled; 1: enabled.

    If the system pressure drops below 0.6 bar, the top-up mode is activated, the icon appears on the display of the Clas Evo System boiler; in this case the "System Fill" cycle starts after pressing button 13:

    The three-way valve switches to position ??;
    - If the pump was turned on, it turns off;
    - if the burner was on, it turns off;
    - after the first filling, the pressure is checked; if the check is negative, error message 1P5 (between B and A) is issued;
    - pressure constancy monitoring; if the check is negative, an error message 6P1 (between C and B1) is generated;
    - a second filling cycle is performed to achieve the pressure set point.

    Ariston Clas Evo boiler error codes (when filling)

    Error 102 - The pressure sensor is not connected or has a short circuit.
    Error 109 - Pressure above maximum (3 bar).
    Error 111 - Pressure below minimum (0.4 bar).
    Error 1P4 - Displayed pressure below (0.6 bar).
    Error 1P5 - The first filling cycle has failed (boiler pressure has not increased): press the appropriate button and try refilling.
    Error 1P6 - Pressure constancy check gave a negative result: press the appropriate button and try refilling.
    Error 1P7 - More than 5 filling cycles in 50 minutes, the filling button is stuck (to reset: turn it off and on again).
    Error 1P8 - More than 6 filling cycles in 7 days, the filling button is stuck (to reset: Off - On).

    Pressure sensor in the heating circuit - The proportional pressure sensor is designed to measure the pressure in the primary circuit. The measured value is displayed on the display of the Ariston Class Evo 24 ff boiler. Monitoring is done by measuring the voltage (DC) between pins 8 and 9 of the CN04 connector. Compatibility of the voltage and pressure values: 0 bar \ u003d 0.3 V, 1.5 bar \ u003d 2.5 V, 3 bar \ u003d 4.8 V. If 0 V is connected to the computer (pressure sensor is not connected) or 5 V (input is incorrectly connected and output), protective shutdown 102 occurs.

    https://cafe-ayo.ru/en/dizajjn/pervyi-zapusk-...ochie-rezhimy-i-nastroiki-kotlov-ariston.html

Topic summary

The discussion revolves around a 2.5-year-old Ariston Clas 24FF stove experiencing intermittent flow error 104, causing the oven to stop functioning. Users suggest potential causes including issues with the pump, flow sensor, or fouling in the boiler exchanger. Cleaning the 3/4 filter is recommended, as black flakes found in the filter may indicate limescale or debris. Several users share troubleshooting steps, including checking the impeller speed, ensuring proper water circulation, and considering the replacement of the electrode if the stove fails to ignite properly. The conversation also touches on the need for professional servicing and the challenges of removing the filter for cleaning.
Summary generated by the language model.
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