Dereli Teknik
Boiler guide
What you can safely do at home while you wait for a technician, when you should call one in, and how to use your boiler more efficiently.
İlhan speaks only Turkish. Write to us in English on WhatsApp: he reads your message and replies with a translation app.
- Why does combi boiler pressure drop, and what should you do?
What should the pressure be, why does it drop and how do you add water?
- Why are your radiators not heating up?
Cold at the top, cold at the bottom or not heating at all: causes and fixes.
- Error code on your combi boiler display: what it means and what to do
What the codes indicate, when a reset helps and when to get help.
- Saving gas with your combi boiler: 9 tips that work
Use less gas through boiler settings, a thermostat and everyday habits.
- 8 checks for your combi boiler before winter
A short list of what to do before the cold weather starts.
- Combi boiler dripping water: causes and what to do
Pressure relief valve, condensate pipe or a leak: what to do first.
Message us on WhatsApp
Just tell us your boiler's brand and the problem. İlhan speaks only Turkish: write in English and he replies using a translation app. From a photo of the display or the error code we can often tell roughly what the fault is.
Phone (Turkish only): +90 535 255 88 00
Your contactİlhan Dereli (speaks Turkish)
Working hoursWeekdays 08:00–20:00
Saturday 09:00–18:00AreaAll of Kocaeli, at your home