Repair and spare parts for Ariston boilers in Madrid
Repair and spare parts inquiry for Ariston in Madrid. Please provide the model, the symptom, and your location to confirm the scope. Independent multi-brand service from the manufacturer.
What do we need to check your Ariston boiler?
To inquire about a repair for Ariston, identify the complete model of the appliance and describe the symptom. A brand or an isolated code does not confirm a compatible spare part. Uniclima offers independent multi-brand support; this page does not certify affiliation with the manufacturer's official service.
- Identify the equipment
- Please provide an exterior photograph of the label, if accessible, along with the model of the involved units.
- Describe the problem.
- Indicate which function is failing, since when, and the exact warning that appears.
- Confirm the scope.
- Add location and access; diagnosis, spare parts, travel, and date are confirmed for each case.
Boiler services
Ariston product range
Condensing boilers
- Clas EVO – A+ class combi condensing, aluminium heat exchanger. Most installed current range in new construction.
- Clas System EVO – condensing heating only, for systems with external DHW tank.
- Genus EVO – compact condensing, ultra-slim design. Widely used in homes with limited space in technical cabinets.
- Cares Premium – condensation with integrated Wi-Fi connectivity and Ariston Net smart thermostat included.
Standard boilers
- Egis Plus - Wall-mounted forced draught boiler, standard range. Widely used in Madrid from 1995 to 2015. Many still in operation.
- Alteas – Combi boiler with integrated 40 L tank. For homes with high DHW demand.
- Microgenus Plus – compact combi boiler, forced draught. Common in small-sized refurbished apartments.
Most common fault codes
Ariston boilers display numerical codes on the screen. The most common ones in the Madrid area:
| Code | Meaning | Common cause |
|---|---|---|
| 101 | Overtemperature in the heating circuit (in the Genus One Net, in the primary circuit) | Temperature exceeded: circulating pump or NTC |
| 102 | DHW NTC sensor out of range | Defective domestic hot water sensor |
| 103 | NTC CH sensor out of range | Heating sensor (flow) fault |
| 104 | Flue gas NTC sensor out of range | Defective flue gas sensor |
| 108 | Low pressure: filling of the system required | Insufficient pressure: fill the circuit or repair the leak |
| 201 | Fault in the NTC sensor of the domestic hot water circuit (Genus One Net) | Defective domestic hot water sensor |
| 501 | Ignition fault | No flame after 3 attempts: gas, electrode, or PCB |
Ariston parts: availability by reference
Check availability and shipping conditions for the specific reference. The timeframe depends on stock and destination; it is confirmed when preparing the proposal or order.
- PCBs (Egis Plus, Clas EVO, Genus EVO)
- Circulator pumps and hydraulic groups
- NTC sensors for heating, DHW, and flue gases
- Gas valves and micro pressure switches
- Extractors and fans
- Primary and plate heat exchangers
- Ignition and ionisation electrodes
Frequently Asked Questions about Ariston Boilers
The most frequently asked questions we receive about Ariston boilers:
Does Ariston also manufacture electric water heaters?
Yes. The Ariston Thermo Group manufactures both gas and condensing boilers as well as electric water heaters, electric water heaters, heat pumps, and solar thermal energy solutions. In Spain, Ariston water heaters are well known. Our service covers Ariston gas boilers. For electric water heaters, contact us to assess the intervention.
What does fault code 501 mean on an Ariston boiler?
Fault code 501 indicates ignition fault with safety lockout. The boiler did not detect a flame after several attempts. Check that the gas is open. If it is open, common causes are: dirty or worn ignition electrode, faulty gas valve, or PCB issues. Reset with the reset button and if it recurs in 1-2 cycles, call a technician.
How long does an Ariston Egis Plus boiler last?
The Egis Plus is a very robust model with a good track record. With annual maintenance, it can last 15-22 yearsIn Madrid, there are many units in operation that are over 18 years old. The most common faults after 10-12 years are the circulating pump, the plate heat exchanger (due to limescale), and the 3-way valve.
Why does my Ariston keep showing error 108 constantly?
The fault code 108 indicates insufficient pressure (you need to fill the installation). If it drops repeatedly even after filling the circuit, there is a leak at some point: it could be internal (gasket inside the boiler), in the expansion vessel (depleted), or at some connection of the radiators. Do not refill repeatedly without locating the source, as it may damage the boiler in the long term.
Is it worth replacing an old Ariston boiler with a condensing one?
Before replacing a boiler, compare the full cost of repair and new installation, equipment condition, material availability and your home's consumption. A percentage of savings or amortisation period cannot be promised without studying the case.
How can I identify the exact model of my Ariston boiler?
The rating plate It is inside the front cover or at the bottom of the body. It includes the model, the power in kW, and the serial number. If the plate is damaged or illegible, send us a photo of the equipment by contact and we help you identify it to locate the correct spare parts.
Does your Ariston boiler need servicing?
Indicate the model and the fault code. We will guide you before the visit.