- Boilers
- Gas boiler
A.02.33
Baxi A.02.33 on a gas boiler: automatic fill warning
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
Baxi A.02.33 is a warning on the Platinum iCompact: automatic filling did not reach pressure in time and FIL flashes. The boiler keeps running. The manual allows pressing F4 for one more try; if it repeats, call the technical service.
Safety first
Stop and check this first
- Any smell of gas outranks everything else: use no flames or switches, shut off the gas if it is safe, open the windows and leave the house. Once safe, ring your gas distributor's emergency line or 112.
- The manual describes a manual fill using a screw beside the solenoid valve. That means opening the casing, so leave it to the technician.
- Pressing F4 more than once is not a fix: if FIL and A.02.33 return, the repair is a job for an authorised technician.
Safe checks you can perform
- Check it is a warning and not a lockout
- Read the water pressure on the display
- Press F4 one time to repeat the fill
- Note whether the pressure drops often
Leave these tasks to a qualified professional
- Do not attempt this professional task: Inspect pressure switch, wiring and filling valve
- Do not attempt this professional task: Look for leaks in the boiler and the system
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.
Inspect pressure switch, wiring and filling valve
What they doAn authorised technician checks the pressure switch wiring and the water filling valve, and the electronic board only if the rest calls for it.
They must show youwhat they checked on each element and with what result.
In writingthe parts inspected or replaced and the warranty.
Look for leaks in the boiler and the system
What they doThe technician checks for water losses that stop the pressure rising during the filling cycle.
They must show youwhere they looked for leaks and what they found.
In writingwhether there is a leak, where it is and what repair is proposed.
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.
Check it is a warning and not a lockout
- Who:
- you, no tools.
- How:
- Look at the display: it should show A.02.33 with the FIL message flashing. A letter A marks a temporary fault in which the appliance keeps working.
- Result that matters:
- If you see an E instead of the A, this is not the case: it would be a permanent fault with a different page.
- If you see A.02.33 and FIL, move on to the pressure.
- If you see a code starting with E or H, look up that code and do not use this page.
- Evidence to keep:
- A photo of the display with A.02.33 and FIL.
Evidence: Baxi Platinum iCompact 26/26 F, 30/30 F y 36/36 F, manual de instalacion, utilizacion y mantenimiento 7867302
Read the water pressure on the display
- Who:
- you, no tools.
- How:
- Look at the system pressure value on the display. The manual gives more than one recommended range depending on the section, so focus on the lower limit. It writes decimals with a comma.
- Result that matters:
- The manual says to refill the system below 0,8 bar and, in a general caution, recommends between 1,0 and 2 bar.
- If the pressure is above 0,8 bar, leave the filling alone and go on to the F4 attempt.
- If it is below 0,8 bar, do not open the casing to look for the solenoid valve:
- press F4 once and, if that is not enough, call the technician.
- Evidence to keep:
- A photo of the pressure value with the time.
Evidence: Baxi Platinum iCompact 26/26 F, 30/30 F y 36/36 F, manual de instalacion, utilizacion y mantenimiento 7867302
Press F4 one time to repeat the fill
- Who:
- you, once only.
- How:
- With FIL flashing, press key F4 to request another filling attempt, as the manual says. Let the cycle finish before looking at the result.
- Result that matters:
- The manual says the normal filling cycle lasts at most ~ 5 minutes.
- If the warning clears and the pressure rises, note the date and watch whether it returns.
- If A.02.33 comes back, do not try again:
- note the code and call an authorised technician.
- Evidence to keep:
- A photo of the display before and after the attempt.
Evidence: Baxi Platinum iCompact 26/26 F, 30/30 F y 36/36 F, manual de instalacion, utilizacion y mantenimiento 7867302
Note whether the pressure drops often
- Who:
- you, no tools.
- How:
- Over a few days, write down when you see the pressure fall or FIL come back. No tool is needed, only dates and values.
- Result that matters:
- The manual asks you to contact the authorised service when the pressure falls often.
- If the pressure holds steady, it may have been a one-off episode.
- If it falls often, show your notes to the technician:
- they help to trace the leak or the filling fault.
- Evidence to keep:
- A list with dates, pressure values and whether FIL showed.
Evidence: Baxi Platinum iCompact 26/26 F, 30/30 F y 36/36 F, manual de instalacion, utilizacion y mantenimiento 7867302
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
- Baxi
- Product type
- Gas boiler
Known code variants
- A 02 33
- A.02 .33
- A02.33
- A0233
- Baxi A.02.33
- Baxi boiler A.02.33
- Baxi FIL A02.33
- Platinum iCompact A.02.33
What it means
In the Platinum iCompact manual (in Spanish only), A.02.33 is described as the maximum refill duration being exceeded. It is a warning, not a lockout: the appliance keeps running and it clears once the cause is resolved. It shows with the FIL message when the filling cycle fails to reach the required pressure in the set time. The warning does not prove that the pressure switch, the filling valve or the board is faulty.
Warnings and stop conditions
- Higheditorial warning
Any smell of gas outranks everything else: use no flames or switches, shut off the gas if it is safe, open the windows and leave the house. Once safe, ring your gas distributor's emergency line or 112.
Evidence: Baxi Platinum iCompact 26/26 F, 30/30 F y 36/36 F, manual de instalacion, utilizacion y mantenimiento 7867302
- Mediumeditorial warning
The manual describes a manual fill using a screw beside the solenoid valve. That means opening the casing, so leave it to the technician.
Evidence: Baxi Platinum iCompact 26/26 F, 30/30 F y 36/36 F, manual de instalacion, utilizacion y mantenimiento 7867302
- Mediumeditorial warning
Pressing F4 more than once is not a fix: if FIL and A.02.33 return, the repair is a job for an authorised technician.
Evidence: Baxi Platinum iCompact 26/26 F, 30/30 F y 36/36 F, manual de instalacion, utilizacion y mantenimiento 7867302
Symptoms and causes
Probable causes · in order
- The filling cycle did not reach pressure in timeCommon
According to the manual, A.02.33 is raised when the system fails to reach the required pressure within the set period; that is the plain reading of the warning.
Evidence: Baxi Platinum iCompact 26/26 F, 30/30 F y 36/36 F, manual de instalacion, utilizacion y mantenimiento 7867302
- Pressure switch wiring with a problemPossible
The warnings table asks for the pressure switch wiring to be checked, a job for a technician and not for the people living in the home.
Evidence: Baxi Platinum iCompact 26/26 F, 30/30 F y 36/36 F, manual de instalacion, utilizacion y mantenimiento 7867302
- Water filling solenoid valve stuck or faultyPossible
The manual mentions the fault can come from the filling solenoid valve being blocked, and the table asks for the water filling valve to be checked.
Evidence: Baxi Platinum iCompact 26/26 F, 30/30 F y 36/36 F, manual de instalacion, utilizacion y mantenimiento 7867302
- A leak in the boiler or the systemPossible
The table includes looking for leaks in the boiler and the system, since if water escapes the pressure cannot climb in the time allowed.
Evidence: Baxi Platinum iCompact 26/26 F, 30/30 F y 36/36 F, manual de instalacion, utilizacion y mantenimiento 7867302
- A fault on the electronic boardLess common
The table lists checking or replacing the board as its last point; only a technician can decide that after ruling out the rest with tests.
Evidence: Baxi Platinum iCompact 26/26 F, 30/30 F y 36/36 F, manual de instalacion, utilizacion y mantenimiento 7867302
Virtual technician
Does A.02.33 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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