Diagnosis and repair
Code and measurement-based root cause; most repairs in one visit.
PROTHERM BOILER SERVICE · INDEPENDENT
Protherm boiler service.Repair, maintenance, genuine parts, installation.
Repair, maintenance and installation for Protherm Lynx, Panther, Gepard and Jaguar — by a team expert in Vaillant-group appliances.
PROTHERM AND KAYAHAN
Protherm: the Vaillant group's value range, serviced with the same care.
Independent-service notice: Kayahan Isı is not Protherm'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.
Protherm is a Vaillant-group brand; its codes, parts and procedures largely match Vaillant's, so our Vaillant experience applies directly.
Ranges we service
- Lynx Condens · Panther Condens / Panther · Gepard · Jaguar
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.63 gas valve and PCB
- Condensate-trap and NTC faults on Lynx; fan and pressure-switch faults on Gepard/Jaguar
Maintenance and parts
CO₂ set by flue-gas analysis on condensing models; draught and leak tests on conventional ones. Genuine Protherm/Vaillant-group parts with written guarantee.
OUR PROTHERM 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 Protherm service.
Are you Protherm's authorised service?
No, we are independent. In-warranty work goes to Protherm'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 Protherm boiler.
Reach us 24/7 by phone or WhatsApp; diagnosis and pricing are stated clearly before any work starts.