The boiler detected that water is not circulating properly; usually a seized pump or air in the system causes it.
What is error E25?
On Baymak Combi Boiler units, code E25 means possible pump blockage. The boiler detected that water is not circulating properly; usually a seized pump or air in the system causes it.
Likely causes
- Pump seized after a long idle period
- Air in the system
- Low pressure or closed valves
Safe steps you can take
- Check the water pressure.
- Bleed the radiators and re-set the pressure.
- Reset once; if it persists, call a technician for the pump.
Freeing the pump shaft is a technical job.
Video guide
An editor-approved video appears here. For now you can search YouTube.
Watch on YouTubeFrequently asked questions
Is error E25 dangerous?
Gas, water and electricity are involved, so take care. Only do the safe steps on this page and don't touch internal parts.
Is a reset enough?
One reset clears temporary causes. If the code comes back, the real cause remains — don't keep resetting.
How much does the repair cost?
It depends on the part. After diagnosis the service sends the price to your tracking link; nothing is done without your approval.
Is the repair guaranteed?
Services on the platform write the warranty for parts and labour on the service form, which is sent to you as a PDF.
Sources: tesisat.org — Kombi arıza kodları . Code meanings can vary by model; check your user manual.