Domusa Teknik • Bilbao • Spain
Repair and spare parts for Domusa boilers in Madrid
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Domusa It is a Spanish company from the Basque Country (Bilbao) founded in 1962, specialized in gas boilers, biomass, and heating systems. Their boilers DTEC F și Classic Gas boilers are common in new residential construction and apartment buildings, especially in the Community of Madrid between 2005 and 2020.
Domusa product range
- DTEC F – Condensing combi boiler, forced draught. Current range with higher efficiency.
- DTEC N – condensing heating only, for systems with external DHW tank.
- Classic - Conventional sealed fan-assisted boiler. The most installed before 2015.
- Bioclass N – Biomass boiler (labourer) for pellets or wood chips. Very popular in homes with gardens in Madrid.
- Ecoplus F – high-efficiency condensing, class A+.
Most common fault codes
| Code | Meaning | Common cause |
|---|---|---|
| E1 | Ignition fault | Gas cut off, electrode or gas valve |
| E2 | Overtemperature | Pump or limit thermostat |
| E3 | NTC heating sensor | Heating temperature sensor |
| E4 | DHW NTC sensor | Domestic hot water sensor |
| E5 | Fan fault | Blocked extractor or speed sensor |
| E7 | Low pressure | Water below 0.5 bar |
Domusa spare parts: stock and 24-hour delivery
Spare parts for the DTEC, Classic, and Ecoplus ranges. Parts located and shipped in 24‑48 h throughout Spain.
View Domusa spare parts catalogueFrequently Asked Questions
Yes. Domusa has been manufacturing boilers and heating equipment for over 60 years in the Basque Country. Their gas models have a good reputation in the Spanish market, and the availability of spare parts for current models is adequate.
E1 indicates ignition faultThe boiler has locked out due to not detecting a flame. Check that the gas is open. The reset is done with the on/off button. If it repeats in the first cycles, a technical visit is required.
Annual inspection in accordance with RITE regulations. Includes burner cleaning, combustion verification, and issuance of the official certificate.
Does your Domusa boiler need servicing?
Indicate the model and the fault code. We will guide you before the visit.