Diagnosis and repair
Code and measurement-based root cause; most repairs in one visit.
VAILLANT BOILER SERVICE · INDEPENDENT
Vaillant boiler service.Repair, maintenance, genuine parts, installation.
With experience gained as Vaillant authorised service, independent repair, maintenance and installation for ecoTEC plus, ecoTEC pro, ecoTEC pure, turboTEC and atmoTEC.
VAILLANT AND KAYAHAN
A measurement-driven service for Vaillant's precision-tuned boilers.
Independent-service notice: Kayahan Isı is not Vaillant's authorised service; we are an independent technical service with 45 years of authorised-service experience. For in-warranty work contact the manufacturer's authorised service; we handle every out-of-warranty fault, maintenance and installation.
Vaillant boilers are efficient but sensitive to settings and part quality. Our team, formerly Vaillant authorised service, repairs them to factory procedure.
Ranges we service
- ecoTEC plus / pro / pure / exclusive — condensing
- turboTEC pro / plus — room-sealed conventional
- atmoTEC — open-flue conventional (conversion recommended)
- aroTHERM heat pumps — maintenance and faults
Frequent faults
- F.28 / F.29 ignition and flame loss · F.22 low pressure · F.23 / F.24 circulation · F.75 pressure sensor · F.61–F.64 gas valve and PCB · F.27 false flame signal
- Condensate-trap and flue-sensor shutdowns on ecoTEC
Calibration and parts
Flue-gas analysis is the heart of a Vaillant service: CO₂ must be set to the range's specification. Only genuine Vaillant parts are used.
OUR VAILLANT SERVICES
For every out-of-warranty need.
Annual maintenance
Exchanger and burner cleaning, flue-gas analysis, safety tests, report.
Genuine spare parts
Manufacturer parts, box and documents handed over, written guarantee.
Installation and conversion
Capacity and flue suitability, condensing conversion, commissioning.
Radiator and system flush
Power-flushing for cold radiators.
24/7 emergency service
Reachable nights, weekends and holidays.
FAQ
About Vaillant service.
Are you Vaillant's authorised service?
No — we were for many years; today we are independent. In-warranty work goes to the manufacturer's authorised service.
Which districts do you cover?
Same-day service across Bahçelievler, Bağcılar, Bakırköy, Güngören, Zeytinburnu, Esenler, Bayrampaşa and Küçükçekmece on Istanbul's European side. Call us for neighbouring districts.
How is the service fee set?
After diagnosis, the work and any part cost are quoted clearly before we start. Nothing is done without your approval.
Is the work guaranteed?
Repair workmanship and the genuine parts we fit are covered by a written guarantee stated on the service report.
SERVICE AREAS
Same-day service on Istanbul's European side.
Our teams are based around Bahçelievler and cover eight districts; the nearest technician is dispatched to you.
BOILER SERVICE BY BRAND
OTHER SERVICES
Book a service visit for your Vaillant boiler.
Reach us 24/7 by phone or WhatsApp; diagnosis and pricing are stated clearly before any work starts.