- Boilers
- Electric water heater
14
Ariston 14 on a Velis water heater: powered heating element fails to heat
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
On an Ariston Velis, Er 14 means the water is not heating even though the outlet side heating element is powered. Reset with ON/OFF; if it persists, the technical service should check the element without you opening the cover.
Safety first
Stop and check this first
- Ariston reserves all maintenance for qualified personnel and requires the heater to be disconnected from the mains before any work. The cover, boards, probes, heating elements and anodes carry mains voltage or sit inside the tank: do not touch them yourself.
Safe checks you can perform
- Reset with the ON/OFF button
- Water and power in the home
- Element and supply measurement
Leave these tasks to a qualified professional
- Do not attempt this professional task: Heating element diagnosis
- Do not attempt this professional task: Replacement with the tank drained, then a test
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Heating element diagnosis
What they doThe technician measures the voltage reaching the element and its resistance with the heater disconnected, before replacing it.
They must show youthe measured voltage and the element value against specification.
In writingwhich part was replaced, whether the flange gasket was renewed and why.
Replacement with the tank drained, then a test
What they doIf the element has to be replaced, the technician drains the heater, keeps elements and sensors in their original positions and refills before switching on.
They must show youthe heater heating with no code.
In writingthe fitting positions checked and the test result.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Reset with the ON/OFF button
- Who:
- you.
- How:
- switch the heater off with the ON/OFF button and switch it back on, as Ariston's error table says. Do not open the cover.
- Result that matters:
- whether, after the reset, the display stops showing Er and 14 and the status light stops flashing red.
- If the code clears:
- Ariston says the heater resumes normal operation; note the date in case it comes back.
- If Er 14 returns or the light stays red and flashing:
- Ariston says to contact the technical assistance centre; do not keep resetting it.
- Evidence to keep:
- a photo of the display with the code before and after the reset, with the date.
Evidence: Ariston Velis, instrucciones para la instalación, el uso y el mantenimiento de calentadores eléctricos
Water and power in the home
- Who:
- you.
- How:
- open a hot tap and a cold tap and check that water flows normally; also check whether the rest of the home has power and whether a breaker or RCD has tripped.
- Result that matters:
- Ariston asks you to rule out a temporary lack of water or electricity before calling the technical service.
- If water was off or there was a power cut:
- wait for supply to return and repeat the ON/OFF reset.
- If water and power are normal:
- the code does not come from the supply; move on to the technical service.
- Evidence to keep:
- a note of when the water or power cut happened, if there was one.
Evidence: Ariston Velis, instrucciones para la instalación, el uso y el mantenimiento de calentadores eléctricos
Element and supply measurement
- Who:
- a qualified Ariston service technician.
- How:
- checks the voltage at the power terminal block and at the element; with the heater disconnected, measures the element resistance and checks board, by-pass tube and sensors.
- Result that matters:
- whether voltage reaches the element and whether the element measures within Ariston's specification.
- If voltage arrives and the element measures out of specification:
- the element is confirmed.
- If no voltage arrives:
- the fault is upstream, in the supply or the board.
- Evidence to keep:
- a job sheet with the measured voltages and values.
Measuring mains voltage and removing the element, which requires draining the tank, is technician work only.
Evidence: Ariston Velis, instrucciones para la instalación, el uso y el mantenimiento de calentadores eléctricos
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Boilers
- Brand
- Ariston
- Product type
- Electric water heater
Known code variants
- 14
- Ariston Velis 14
- calentador Rinnai 14
- código 14 Rinnai
- Er 14
- error 14 Rinnai
- Rinnai 14
- Rinnai 14 overheat
- Rinnai code 14
- Rinnai code 14 thermal fuse
- Rinnai error 14
- Velis error 14
What it means
Ariston defines code 14 as failure to heat water with the heating element powered on the outlet side; 24 is the same on the inlet side. The control calls for heat and does not see the temperature rise. For cold water at the tap, Ariston asks for checks of the voltage at the power terminal block, the board, the heating elements, the by-pass tube and the sensor bars. The code does not say which of them has failed.
Warnings and stop conditions
- Highsource verified
Ariston reserves all maintenance for qualified personnel and requires the heater to be disconnected from the mains before any work. The cover, boards, probes, heating elements and anodes carry mains voltage or sit inside the tank: do not touch them yourself.
Evidence: Ariston Velis, instrucciones para la instalación, el uso y el mantenimiento de calentadores eléctricos
Symptoms and causes
Probable causes · in order
- Heating element not heatingCommon
This is what the code describes. It is confirmed by measuring the element's electrical resistance, not by the code.
Evidence: Ariston Velis, instrucciones para la instalación, el uso y el mantenimiento de calentadores eléctricos
- Power or board not reaching the elementPossible
Ariston includes terminal block voltage and the board in the list for cold water. They are told apart from the element by measuring voltage with the heater running.
Evidence: Ariston Velis, instrucciones para la instalación, el uso y el mantenimiento de calentadores eléctricos
- Blocked by-pass tube or sensorsPossible
Ariston only has the by-pass tube inspected when there is a fault from blockage, and it also lists the sensor bars. They are the option when element and supply measure correctly.
Evidence: Ariston Velis, instrucciones para la instalación, el uso y el mantenimiento de calentadores eléctricos
Virtual technician
Does 14 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
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