Before winter: get your boiler serviced
Dereli Teknik Combi boiler service

In İzmit and Kocaeli

Radiator cleaning

If your radiators are hot at the top but cold at the bottom, some rooms don't warm up, or the house takes a long time to heat, sludge and deposits may have built up in the system. We clean radiators with a machine and check the system.

İlhan speaks only Turkish. Write to us in English on WhatsApp: he reads your message and replies with a translation app.

Do you need radiator cleaning?

  • The top of the radiator is hot, the bottom is cold
  • Some radiators don't heat up at all
  • The boiler runs for a long time but the house heats up slowly
  • The water that comes out when you bleed a radiator is dark

If only the top of the radiator is cold, the problem is usually air; bleeding the radiator may be enough. If you are not sure, message us and we'll explain on WhatsApp. More: Why are radiators not heating up?

How is it done?

  1. A cleaning machine is connected to the heating system.
  2. The sludge and deposits in the radiators are flushed out together with the water in the system.
  3. The system is refilled with clean water, bled, and the pressure is set.
  4. The boiler is switched on and each radiator is checked.

What our customers say

  • Ömerkörfez · September 2026

    Hızlı ve kusursuz bir işçilik . Geç saatte başıma gelen arızaya saat farketmeksizin yetişen mükemmel bir usta samimi ve iyi yaklaşımlarıyla hem müşteri hizmeti hem iş hizmeti olarak 10/10 . Çok memnun kaldık Dereli teknik 💯

  • İbrahim KaplanKartepe · September 2026

    Temiz ve güvenilir bir şekilde sorunumuz çözüldü.
    Benim tahmin ettiğim fiyatın çok altında kalan bir hizmet oldu.
    Cumartesi akşam olmasına rağmen aramam ile sorunun çözülmesi iki saati bulmadı.
    Teşekkürü bir borç bilirim.

Questions about radiator cleaning

All questions

When is radiator cleaning needed?

If the bottom of the radiators stays cold, some radiators don't heat up at all, or the house heats up slowly even though the boiler runs for a long time, sludge and deposits may have built up in the system.

If only the top of a radiator is cold, does it need cleaning?

Usually not. If only the top of the radiator is cold, the problem is usually air; bleeding the radiator may be enough. If you are not sure, message us and we'll explain on WhatsApp. More in our radiators not heating up article.

How is radiator cleaning done?

A cleaning machine is connected to the system. The sludge and deposits in the radiators are flushed out together with the water in the system. The system is refilled with clean water, bled, the pressure is set, and each radiator is checked.

Can I find out the price in advance?

Yes. We tell you the price before starting work; we never start without your approval.

What should I do if the pressure drops after bleeding the radiators?

It is normal for the pressure to drop a little as the radiators are bled. If the gauge goes below 1 bar, add water. We explain how in our boiler pressure article.

Other services

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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)

  • Emaililhan@dereliteknik.com

  • Working hoursWeekdays 08:00⁠–⁠20:00
    Saturday 09:00⁠–⁠18:00

  • AreaAll of Kocaeli, at your home

Message on WhatsApp