- Appliances
- Coffee machines
SIMBOLO-DEPOSITO-AGUA-ENCENDIDO
Melitta coffee machine water tank symbol lit or flashing
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Medium
Quick answer
On a Melitta Solo coffee machine, a steady water tank symbol asks you to fill the water tank, while a flashing symbol asks you to insert it. If the symbol stays lit when the tank is full, Melitta states the tank is not engaged at the rear or the float is jammed.
Safety first
Stop and check this first
- Melitta Solo instructions state that you should change the water daily and fill the tank only with fresh, non-carbonated tap water without exceeding the MAX mark.
- When shaking the emptied water tank to free a blocked float, shake it carefully so you do not crack or damage the plastic tank.
Safe checks you can perform
- Fill the water tank up to the MAX mark with fresh, non-carbonated tap water
- Ensure the water tank is properly engaged in the rear retainer
- Empty and carefully shake the water tank to free a jammed float
Leave these tasks to a qualified professional
- Do not attempt this professional task: Contact Melitta customer service if the float remains stuck or the full tank is still not recognised
- Do not attempt this professional task: Book an authorised Melitta workshop repair if the tank coupling leaks or fails to draw water
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.
Contact Melitta customer service if the float remains stuck or the full tank is still not recognised
What they doIf the float inside the tank is damaged or the water tank symbol stays illuminated after checking the rear retainer and shaking the emptied tank, contact Melitta customer support.
They must show youthe inspection of the water tank float movement and live level detection on the appliance.
In writingthe Melitta service reference number and whether a replacement water tank or internal sensor check is required.
Book an authorised Melitta workshop repair if the tank coupling leaks or fails to draw water
What they doIf the symbol clears but water leaks from the base coupling or the machine fails to draw water from the tank, arrange inspection at an authorised Melitta service centre without opening the casing.
They must show youthe leak test at the water tank valve seat and cold-water intake check.
In writingthe written repair report listing any replaced seals or inlet parts and the completed function test.
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.
Fill the water tank up to the MAX mark with fresh, non-carbonated tap water
- Who:
- you.
- How:
- raise the lid of the water tank, pull the tank up and out of the appliance, fill it only with fresh, cold, non-carbonated tap water up to the MAX mark (1.2 l) and reinsert it.
- Result that matters:
- the steady water tank symbol going out if the tank was simply low on water.
- If the symbol switches off once the filled tank is fitted:
- you can prepare coffee again.
- If the symbol stays lit or flashes with water at the MAX line:
- check the rear retainer and the float.
- Evidence to keep:
- photo of the water tank filled to the MAX mark and the display panel.
Evidence: FAQ - Solo · Operating Instructions: Melitta Solo
Ensure the water tank is properly engaged in the rear retainer
- Who:
- you.
- How:
- if the water tank symbol flashes or remains lit with a full tank, check its seating and make sure that the water tank is firmly engaged in the retainer at the rear.
- Result that matters:
- the tank sitting flush in its compartment and the flashing symbol clearing.
- If engaging the tank in the rear retainer clears the symbol:
- it had not been seated all the way back.
- If it is properly engaged at the rear but still shows no water:
- inspect the float inside the tank.
- Evidence to keep:
- photo showing the water tank seated flush against the rear retainer on the Melitta Solo.
Evidence: FAQ - Solo · Operating Instructions: Melitta Solo
Empty and carefully shake the water tank to free a jammed float
- Who:
- you.
- How:
- if the appliance still indicates no water with a full tank, remove the water tank, empty the water, check the condition of the float and carefully shake the tank until the float moves freely again.
- Result that matters:
- the water level float moving freely so the water tank symbol switches off when refilled.
- If the float unjams and the symbol goes out after refilling:
- a stuck float was causing the alert.
- If the float will not move freely or the symbol stays on:
- contact Melitta customer service.
- Evidence to keep:
- short video or photo of the float position inside the water tank.
Evidence: FAQ - Solo · Operating Instructions: Melitta Solo
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
- Appliances
- Brand
- Melitta
- Product type
- Coffee machines
Known code variants
- Melitta Colocar el depósito de agua
- Melitta Fill the water tank symbol
- Melitta indica Falta agua con depósito lleno
- Melitta indicates no water although tank is full
- Melitta Insert the water tank symbol
- Melitta Rellenar el depósito de agua
- Melitta símbolo depósito de agua encendido
- Melitta Solo float jammed
- Melitta Solo flotador bloqueado
- Melitta Solo símbolo depósito de agua parpadea
- Melitta Solo water tank symbol flashing
- Melitta water tank symbol illuminated
What it means
According to the official Melitta Solo Operating Instructions and Melitta UK Solo FAQ, the water tank symbol lit steady means Fill the water tank, whereas a flashing water tank symbol means Insert the water tank. If the appliance still indicates no water with the symbol illuminated even though the tank is full, Melitta documents two specific causes: the water tank is not engaged in the rear retainer, or the water-level float inside the tank is blocked. Other Melitta models use text displays. On its own, this symbol never proves an internal sensor or pump failure.
Warnings and stop conditions
- Mediumeditorial warning
Melitta Solo instructions state that you should change the water daily and fill the tank only with fresh, non-carbonated tap water without exceeding the MAX mark.
Evidence: Operating Instructions: Melitta Solo
- Loweditorial warning
When shaking the emptied water tank to free a blocked float, shake it carefully so you do not crack or damage the plastic tank.
Evidence: FAQ - Solo · Operating Instructions: Melitta Solo
Symptoms and causes
Probable causes · in order
- Water tank empty or below the minimum operating levelCommon
The water tank symbol illuminates steadily because the 1.2-litre tank has run out of water during beverage preparation or rinsing.
Evidence: FAQ - Solo · Operating Instructions: Melitta Solo
- Water tank removed or not engaged in the rear retainerPossible
The symbol flashes when the tank is not fitted, or stays illuminated with a full tank when it is not properly engaged in the retainer at the rear.
Evidence: FAQ - Solo · Operating Instructions: Melitta Solo
- Water level float inside the water tank blocked or jammedPossible
Both the Melitta Solo manual and official FAQ note that a jammed float prevents the machine from detecting water even when the tank is full.
Evidence: FAQ - Solo · Operating Instructions: Melitta Solo
Virtual technician
Does SIMBOLO-DEPOSITO-AGUA-ENCENDIDO 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
- 1
Melitta · 2026 · official_doc
- 2
Operating Instructions: Melitta Solo
Melitta · 2026 · official_doc
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