Service +48 87 429 56 56

If you are having questions about your device, please contact our consultant:

  • Monday - Friday: 7.00 AM - 3.00 PM

"Order service" hotline

  • Monday - Friday: 3.00 PM - 8.00 PM
  • Saturdays, Sundays and Holidays: 10.00 AM - 4.00 PM

KOSTRZEWA service provides comprehensive servicing for your device.


Despite ongoing fight against coronavirus pandemic worldwide, servicing works and heating devices maintenance should not be delayed. KOSTRZEWA biomass boilers service works without reservations on the basis of an extensive network of authorized regional service technicians.

Serwis kotłów c.o. podczas pandemii COVID-19

Out of safety concern for both our customers and service technicians, we put our best endeavours to ensure that conducted works are compliant with all precautions.

We recommend ensuring the exact course of order in advance by phone or e-mail, so that service technician’s stay period at the client’s house can be reduced to the possible extent.


In order to establish deadline of overview, please contact your local Authorized Service Technician or KOSTRZEWA Service Department.

Service helpline

+48 87 429 56 56

ul. Przemysłowa 1

11-500 Giżycko