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Boiler Brotje WHBS22: Removing Fault E119 with Correct Water Pressure - Solutions Needed

dorg 23331 19
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How can I clear Brotje WHBS22 error E119 when the system water pressure is already normal?

E119 is usually caused by a faulty or clogged pressure sensor, not by low system pressure if the boiler is already at 1–3 bar [#16652292] Some users temporarily cleared it by raising the pressure to about 3 bar and power-cycling the boiler, after which it started again [#16658093] A more lasting fix is to unscrew the water pressure sensor, clean the inlet hole from limescale/sludge, gently clear the center with a nail or needle, then rinse it carefully [#19530407] It is also worth checking the condensate siphon and any leaks or loose connections inside the boiler [#19530407] If the sensor is damaged, replace it with the correct original part; one user reported success with SIT 0340009, while another mentioned SIT 0340008 for a similar model [#16778679]
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  • #1 16640300
    dorg
    Level 2  
    Posts: 4
    Rate: 3
    Good morning, can someone suggest me how to remove the fault E119 in the Brotje22 oven? I know this is a malfunction regarding the water pressure in the system, but in this case the pressure is correct. Thanks, D
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  • #2 16652292
    Nargo
    Level 23  
    Posts: 495
    Help: 45
    Rate: 206
    dorg wrote:
    but in this case the pressure is correct. Thanks, D

    What?
    The correct range is between 1 bar and 3 bars.
    If it's in this range then you have a damaged pressure sensor.
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  • #3 16658093
    dorg
    Level 2  
    Posts: 4
    Rate: 3
    thanks, but after increasing the pressure to 3 and turning the boiler off / on it somehow started off.
  • #4 16718654
    n3opl
    Level 11  
    Posts: 36
    Rate: 8
    Hello, can someone tell me what may be wrong, I have the same problem WHBS 22 stove, error e119, pressure 1.5 bar and the stove still does not start; /
  • #5 16721387
    dorg
    Level 2  
    Posts: 4
    Rate: 3
    try to do the same as I do, raise the pressure to 3 and turn the oven off / on, he moved
  • #6 16721476
    n3opl
    Level 11  
    Posts: 36
    Rate: 8
    Ok, I'll try it today, I have jumpered the sensors and it's obviously his fault: /
  • #7 16721614
    BUCKS
    Level 39  
    Posts: 3820
    Help: 536
    Rate: 1085
    @ n3opl
    Usually in gas boilers there is a safety valve with a nominal pressure of 3 bars.
    When it comes to the maximum working pressure, a tolerance of 0.5 bar is taken.
    So the maximum operating pressure in this case is 2.5 bar.
    If you increase the system pressure to 3 bar, you automatically increase the chances that a safety valve will shoot you. If you do not have a hose on this valve to drain water into the sewage system, you may flood the room in which you have a boiler.

    @dorg
    instead of searching and removing the cause, you only removed the effect.
    And this does not guarantee a complete solution to the problem, so you have to reckon with the fact that the problem will come back someday, maybe even with doubled strength.
    I think that in the case of a central heating boiler, underestimating the symptoms and using this type of half-measures is not a good solution, because if the boiler refuses to obey you during the heating season, you will have a big problem.
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  • #8 16721617
    n3opl
    Level 11  
    Posts: 36
    Rate: 8
    I am in the process of looking for this sensor, do you think that a replacement with the same parameters could be used or better not to play such a thing and order the original from the manufacturer or dealer ??
  • #9 16721636
    BUCKS
    Level 39  
    Posts: 3820
    Help: 536
    Rate: 1085
    when it comes to spare parts, I prefer only the originals, because then you have the right characteristics, and replacements if they exist, it is not known what they offer.
    The pressure sensor is on the left, below the fan. Download the installation instructions from the net if you don't have one and see the diagram for yourself.
  • #10 16723187
    dorg
    Level 2  
    Posts: 4
    Rate: 3
    indeed, it sounds reasonable, it looks like it can only be fortune-giving action. thank you very much.
  • #11 16778679
    gsadecki
    Level 11  
    Posts: 5
    Rate: 3
    Hello. For me, this pressure sensor began to cause error 119. The oven was the SIT sensor - 0340009 Manufacturer's code: 0340009.
    On the pages with parts for the Brotje furnace there are very expensive about 700 PLN, I found for 134 PLN gross waiting time, unfortunately, 5 weeks, I ordered and waiting.
  • #12 16778746
    BUCKS
    Level 39  
    Posts: 3820
    Help: 536
    Rate: 1085
    Looking at the difference in price, waiting 5 weeks is probably worth it, it comes out for about PLN 100 for each week, assuming that you get a new original, because sometimes these deals are illusory and you need to be careful not to blend in.
    It is different if the boiler completely refused to obey during the frost without any alternative for immediate heating, then you have to cry and pay.
  • #13 16778787
    jack63
    Level 43  
    Posts: 11737
    Help: 848
    Rate: 2796
    gsadecki wrote:
    On pages with parts for the Brotje furnace are very expensive about 700 zlotys, I found for 134 zlotys

    If it is a normal pressure switch (two cables work and ok after short circuiting), PLN 700 is a mere rip-off!
    You have to check it and if it turns out that the pressure switch is to use a broken ori as a connector for another pressure switch with the correct operating range. The adapted one will probably be less safe ...
    However, you have to do it with your head on your neck to ensure boiler safety.
  • #14 16778799
    gsadecki
    Level 11  
    Posts: 5
    Rate: 3
    It's the same identical spare part from the same company. The sensor is disconnected and the jumper connected instead, Water pressure on the stove lowered to about 1.2 bar, The furnace heats up.

    Added after 59 [minutes]:

    jack63 wrote:
    gsadecki wrote:
    On pages with parts for the Brotje furnace are very expensive about 700 zlotys, I found for 134 zlotys

    If it is a normal pressure switch (two cables work and ok after short circuiting), PLN 700 is a mere rip-off!
    You have to check it and if it turns out that the pressure switch is to use a broken ori as a connector for another pressure switch with the correct operating range. The adapted one will probably be less safe ...
    However, you have to do it with your head on your neck to ensure boiler safety.

    Yes, it is a pressure switch, you can play and use the old one as an adapter but it is easier and without problems to buy the original for 134 zlotys. If I had to pay 700 ori, I would combine. In the attachments, the pressure switch is removed from the oven (I have a WGB 20 C oven), and the new catalog card with the SIT tip - 0340008. The oven has SIT - 0340009, it is custom made, so you have to wait 5 weeks.
    Attachments:
    • product-SIT_-_0340008_-_czujnik_cinienia_6_bar_15008-0001_901.41_600-400.pdf (709.99 KB) You must be logged in to download this attachment.
    • Boiler Brotje WHBS22: Removing Fault E119 with Correct Water Pressure - Solutions Needed w piecu.jpg (817.11 KB) You must be logged in to download this attachment.
  • #15 19530407
    eedww
    Level 11  
    Posts: 4
    Rate: 4
    Unscrew the water pressure sensor from the boiler, clean the entrance hole from limescale and sludge, and then thread it with a nail, something metal if blocked, be careful not to pour water into the electronic part, i.e. from the plastic head. Soak to the center so that the nail or needle enters the center of the sensor, but not too deeply so as not to damage it from the inside, scratch it, rinse it a few times and do not buy new ones, just enjoy a working boiler again. Yesterday I did this after error 119 on Brotje wgb38 on 2 boilers and both worked immediately. By the way, clean the condensate siphon, check if there is something dripping somewhere inside the connections, or tighten what you need because the connections are loosened over time.
  • #16 19607294
    Remod1
    Level 5  
    Posts: 183
    Rate: 5
    "gsadecki" which model did you finally buy?
    SIT - 0340008 or SIT - 0340009
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  • #17 19609453
    gsadecki
    Level 11  
    Posts: 5
    Rate: 3
    I bought SIT - 0340009
  • #18 19798881
    bronet
    Level 11  
    Posts: 7
    Rate: 4
    Hello, after unscrewing this sensor at the end of the thread inwards, there is a black deposit or is it a membrane?
    Because the sensor has stopped working and I wonder if it is not enough to unblock it, and I cannot find the photo from the inlet side.
  • #19 20528886
    vongrej
    Level 1  
    Posts: 1
    Hi, my pressure sensor stopped working again. I don't mind calling a service for this problem every 2-3 years (usually during public holidays or during heating top season). Can you help me to unscrew the sensor? I have to remove it completely, or is there some red screw on the top? Won't water leak out of that pipe? Is there anything else I should do to it before disassembly for safety? The disconnection from the electricity is first...

    Thanks in advance
  • #20 20534998
    eedww
    Level 11  
    Posts: 4
    Rate: 4
    >>19530407
    ... I flooded the system with the cheapest corrosion inhibitor from allegro and to this day there is no return of the problem with clogged sensors. Corrosion inhibitor - I confirm that it is worth pouring ... see the dates of posts - this is how long the problem does not return. It appeared for the first time after a year of using the boiler, when it was not flooded with an inhibitor yet. Corrosion inhibitors also minimize these scale / water scale deposits not only on the sensors.. pumps last longer, the heat exchanger will probably be easier to clean after many years and not after 2, etc..

Topic summary

✨ The discussion revolves around troubleshooting the E119 fault in the Brotje WHBS22 boiler, which is associated with water pressure issues. Users confirm that the correct pressure range is between 1 and 3 bars, and suggest that a malfunctioning pressure sensor may be the cause if the pressure is within this range. Several users recommend increasing the pressure to 3 bars and restarting the boiler as a temporary fix. However, caution is advised regarding the safety valve and potential flooding. The importance of using original replacement parts for the pressure sensor is emphasized, with some users sharing experiences of sourcing cheaper alternatives. Cleaning the pressure sensor to remove blockages and using corrosion inhibitors to prevent future issues are also discussed as effective solutions.
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FAQ

TL;DR: E119 on Brotje WHBS22 points to water‑pressure sensing. Typical spec: 1–3 bar; “raising to 3 bar risks safety valve lift.” [Elektroda, BUCKS, post #16721614]

Why it matters: This FAQ helps homeowners and technicians quickly clear E119 safely, decide on sensor cleaning vs. replacement, and prevent repeat faults.

Quick Facts

What does error E119 mean on a Brotje WHBS22?

E119 flags a water‑pressure issue detected by the boiler. Verify the gauge reads within 1–3 bar. If pressure is correct yet E119 persists, suspect a faulty or blocked pressure sensor. Replacement or cleaning restores normal operation. [Elektroda, Nargo, post #16652292]

What pressure should I set to clear E119 without risking damage?

Keep system pressure within 1–3 bar. Do not rely on 3 bar as a fix. The safety valve is 3 bar and the recommended maximum working pressure is about 2.5 bar to avoid discharge and potential flooding. [Elektroda, BUCKS, post #16721614]

Is increasing pressure to 3 bar and power‑cycling a valid fix?

It may temporarily clear E119 after a restart, but it treats the symptom, not the cause. Expect the problem to return if the sensor is faulty or blocked. Address the root cause to ensure reliability during the heating season. [Elektroda, BUCKS, post #16721614]

How do I reset the boiler after adjusting pressure?

Users report that switching the boiler off and on after adjusting pressure can restore operation. This reset only helps if the sensor detects acceptable pressure. It does not repair a failing or dirty sensor. [Elektroda, dorg, post #16658093]

Where is the Brotje pressure sensor located on these models?

The pressure sensor is on the left, below the fan. Check your installation manual’s diagram to confirm exact placement before removal. Using the correct location reduces disassembly time and avoids wiring mistakes. [Elektroda, BUCKS, post #16721636]

How do I clean a clogged pressure sensor to clear E119?

Turn off power. Remove the sensor. Gently clear the inlet of limescale/sludge with a thin metal pin, avoiding the plastic head. Rinse the passage and reinstall. Protect electronics from water ingress during cleaning. “Clean, don’t buy new, and enjoy a working boiler.” [Elektroda, eedww, post #19530407]

Can I jumper/bypass the pressure sensor to get heat?

Some users jumpered the sensor and the boiler heated, confirming a sensor fault. Use this only for brief diagnosis. Restore a working sensor promptly to maintain safety interlocks and compliance. [Elektroda, gsadecki, post #16778799]

Which pressure sensor model should I buy for Brotje/WGB family?

Owners of WGB 20 C reported an original SIT 0340009 sensor and referenced SIT 0340008 documents. 0340009 was custom and required waiting. Match the exact part number on your unit’s sensor label. [Elektroda, gsadecki, post #16778799]

Original vs. aftermarket sensor—what’s safer?

Choose original parts to ensure correct characteristics and fit. Aftermarket substitutions can differ in range and behavior, affecting safety. Refer to your manual and part label when ordering. [Elektroda, BUCKS, post #16721636]

How much will a new sensor cost and how long will it take?

Shared prices ranged around PLN 134 with about a 5‑week wait, while some outlets listed about PLN 700. Plan ahead before peak heating season to avoid downtime. [Elektroda, gsadecki, post #16778679]

My gauge shows 1.5 bar but E119 persists—what next?

At 1.5 bar the pressure is within the typical operating range. Persistent E119 at correct pressure points to a damaged or blocked pressure sensor. Clean or replace it. [Elektroda, Nargo, post #16652292]

What is the maximum safe operating pressure before the valve opens?

The safety valve’s nominal opening is 3 bar. Typical maximum working pressure is about 2.5 bar to avoid nuisance discharge and leaks. Exceeding this risks flooding. [Elektroda, BUCKS, post #16721614]

There’s a black layer at the sensor inlet—is that normal?

That deposit is limescale/sludge that blocks the passage and mimics low pressure. Carefully scrape and flush the inlet without damaging the internal parts or wetting the electronics. [Elektroda, eedww, post #19530407]

How do I safely remove the sensor—will water leak out?

Cut power first. Expect some water, so prepare towels and isolate the section if possible. Unscrew the sensor and keep the plastic head dry while clearing the inlet. Refit and check for drips at connections. [Elektroda, eedww, post #19530407]

What preventive step reduces E119 coming back?

Add a system corrosion inhibitor. Users report that after dosing, clogged pressure sensors stopped recurring for years, and pumps and heat exchangers benefit too. [Elektroda, eedww, post #20534998]

After a temporary fix, will E119 return?

Yes, if you only reset or raise pressure, you remove the effect, not the cause. Replace or clean the sensor to avoid mid‑season lockouts. [Elektroda, BUCKS, post #16721614]
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