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
- Correct system pressure range: 1–3 bar; outside this, expect E119 or lockout. [Elektroda, Nargo, post #16652292]
- Safety valve is nominally 3 bar; max working pressure ≈ 2.5 bar to avoid discharge. [Elektroda, BUCKS, post #16721614]
- Common pressure switch models: SIT 0340009 (custom) and 0340008; reported 5‑week lead time. [Elektroda, gsadecki, post #16778799]
- Typical prices shared: ~PLN 134 vs. ~PLN 700 for some outlets. [Elektroda, gsadecki, post #16778679]
- Proven field fix: remove sensor, clear limescale/sludge, protect electronics from moisture. [Elektroda, eedww, post #19530407]
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]
