Arçelik Gas boiler F43: Pressure remains low after filling

Model compatibility has not been independently verified

Earlier archive data contained suggested model or series names. Without a clear model/code table in a manufacturer manual, these names are no longer displayed as verified matches.

This is general brand/device guidance; check the model label and official manual.

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What does F43 mean?

Arçelik Gas boiler F43: Pressure remains low after filling. The manufacturer manual applies to DGK YP 25 PRMX · DGK YP 33 PRMX. Other models may use this code differently.

Source scope: Compatibility with specific model numbers has not been established. Always check your exact appliance manual.

Code meaning compared with manufacturer material — exact model not independently verified

Documented model/series: DGK YP 25 PRMX / DGK YP 33 PRMX. Evidence: Kılavuz PDF s. 19, arıza tablosu; DGK YP PRMX modelleri. Codes can mean different things on other models. This does not establish a failed part.

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What can you check?

01
Identify the exact code and model
Photograph the Arçelik display showing F43 and the product model label. The cited manufacturer evidence covers: DGK YP 25 PRMX / DGK YP 33 PRMX. Do not assume other models use the same code meaning.
What the result means: If your model differs, consult its specific manual before acting on the guidance.
02
Do not repeatedly reset an F code
This model lists F codes that may not be manually reset, including electrical, sensor and water-pressure conditions.
What the result means: Do not touch gas valves, wiring, heat exchanger or internal water parts.
03
Escalate if the code persists
Give authorised support the exact code, model number and when it appeared. Do not open electrical control boards, valves, fan housings, compressor systems or refrigerant pipes.
What the result means: A code description alone does not prove which component must be replaced.

PRACTICAL FIX / REPAIR

How do you actually fix this?

Start with safe checks. Some codes have no safe home fix; in that case we explain what the professional repair actually involves.

Practical fixes you can try

If there is no gas smell or leak, read the boiler pressure gauge and compare it with the specified cold-system pressure in your exact manual.
Only where the manual explicitly permits user filling and you can positively identify the filling control, add water slowly while cool to the stated range, then close the control fully.
If pressure drops repeatedly, do not keep topping up; observe accessible joints and radiator areas for leaks.

If it persists, how is it actually repaired?

A heating engineer checks for leaks, expansion-vessel, relief-valve, filling-valve and pressure-sensing faults, then tests the repaired system at the specified pressure.

How do you know it is fixed? Cold pressure must stay within the model range across normal cycles.

Safety and warranty: Warranty terms depend on manufacturer, model and local law. Damage caused by unauthorised disassembly or improper repair may be excluded. Live electrical work, gas, refrigerant circuits and sealed cabinets require qualified professionals; this is not a DIY instruction for those tasks.

Evidence: The manufacturer link above supports the broad code meaning. The repair pathway is a general technical diagnostic explanation, not a confirmed failed-part diagnosis for every model.

Manufacturer reference

Independent safety-focused explanation with a manufacturer link. Possible causes are not verified part diagnoses; the code may vary by model or region.

Open the original manual ↗