Huba Control Air Pressure Switch Ferroli Domina F24 Boiler - Code 605.99477
Differential air pressure switch by Huba Control, manufacturer confirmed on the label and by external sources, used in Ferroli Domina F24 boilers and numerous related models of the brand. It controls the pressure generated by the fan before ignition. Calibrated at 47 Pa / ΔP+12 Pa, with a contact rating of 1(0.5) A at 250 V~. Component code 605.99477.
- Type of part
- Pressure switches
- Status
- Refurbished
- Catalogue reference
- 39805631
- Warranty
- 1 year
Ferroli boilers compatible with reference 39805631
Pressure switch with reference 39805631. Five confirmed compatibilities: Domina F24E and Domina F30E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Ferroli Domina F24E | Domina | Contrasted |
| Ferroli Domina F30E | Domina | Contrasted |
| Ferroli Domitop DGT F30E | Domitop | Contrasted |
| Ferroli New Elite F24 | New Elite | Contrasted |
| Ferroli Domicompact F24 | Domicompact | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if ref. 39805631 is the part for your boiler
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 39805631. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms that require diagnosis in the pressure switch 39805631
The pressure switch controls the air or water pressure to authorize operation. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler locks out as soon as the fan starts, even before attempting the spark.
Cause: The air pressure switch must close the contact almost instantly for the control board to continue the ignition sequence; if it takes too long or does not close, it cuts off right there.
Note that the fan starts at normal speed and without the noise of blades rubbing; a slow extractor will never generate the pressure that the pressure switch needs.
- 02
The fault warning points to the extractor or the flue, regardless of the exact model of the boiler.
Cause: This pressure switch is installed in many Ferroli models with the same function: if it does not switch, everyone interprets that there is a lack of flue draft.
Check that the chimney or flue does not have moisture, accumulated soot, or obstructions before confirming the replacement as good.
- 03
The fault comes and goes depending on whether the boiler has been on for a short or long time.
Cause: A pressure switch with a damaged diaphragm can hold the differential when cold and lose it when the assembly heats up.
Note whether the fault occurs always when cold, always when hot, or without a pattern; this observation helps to distinguish the pressure switch from other causes before replacing it.
Ferroli fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| F4 | Operation of the air pressure switch. | The air pressure switch remains closed when it should open (stuck contact or tubes/venturi improperly connected/blocked). Check with a multimeter that it opens when the fan stops and inspect pressure tubes and air/smoke ducts. |
| F5 | Operation of the air pressure switch. | The pressure switch does not close within the time (~55 s) after activating the fan due to lack of depression/draught or a defective pressure switch. Check closure with a multimeter when starting the fan and inspect the venturi, pressure tubes, and possible obstruction in air/smoke. |
| F6 | Operation of the air pressure switch. | The pressure switch contact remains closed after several start-up attempts, indicating a stuck APS or reversed connection. Measure opening/closing with a multimeter and check the correct connection of the tubes to the pressure switch and the operation of the fan. |
These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.
Datasheet for Ferroli pressure switch 39805631
- Catalogue reference
- 39805631
- Uniclima internal SKU
- PFDF24
- Brand
- Ferroli
- Type of part
- Pressure switches
- Units in stock
- 7 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- Setpoint
- 47 Pa / ΔP+12 Pa
- Voltage
- 250 V~
- Contact current
- 1(0.5) A
- Manufacturer
- Huba Control
- Component code
- 605.99477
Frequently asked questions about the pressure switch 39805631
Who manufactures the pressure switch for the Ferroli Domina F24?
What pressure is the pressure switch 605.99477 of the Domina F24 set to?
What electrical contact does the Huba Control pressure switch of the Ferroli Domina F24 have?
Is this pressure switch suitable for the Ferroli Falcon 80?
Is the pressure switch 605.99477 compatible with the Ferroli Domitop DGT F24E?
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