Huba Control Pressure Switch 605.99065 For Saunier Duval Isomax F 35 H-MOD - Ref. 0020048295
The Huba Control 605.99065 pressure switch for Saunier Duval Isomax F 35 H-MOD controls the air or water pressure in the boiler, allowing it to operate properly. When it fails, the boiler may not start or may lock out, even if the actual pressure is correct, which can generate fault code 02: Air flow fault. This pressure switch is compatible with models from the Isomax range, such as the Condens F 35 E, among others. It is recommended to replace this part when operational issues related to pressure are detected.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 0020048295
Pressure switch with reference 0020048295. Four confirmed compatibilities: Condens F 35 E and Condens F 35 H-MOD.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Condens F 35 E | Isomax | Contrasted |
| Saunier Duval Condens F 35 H-MOD | Isomax | Contrasted |
| Saunier Duval F 35 H-MOD | Isomax | Contrasted |
| Saunier Duval F 35 H-MOD | Isotwin | 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. 0020048295 is the part for your boiler
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 0020048295. 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 and faults that the pressure switch 0020048295 resolves.
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 tries to ignite, you can hear the fan, and after a few seconds, it stops without producing a flame.
Cause: The differential pressure switch does not detect the depression generated by the fan, and the control unit blocks the gas flow for safety.
Check that the two silicone tubes connecting the pressure switch to the fan and the combustion chamber are not bent, loose, or have condensation inside.
- 02
A fault code related to the fan or flue gas evacuation appears.
Cause: If the pressure switch contact does not switch at the correct moment, the control unit interprets that there is not enough draft even though the fan is working properly.
Check the condensate trap and the flue outlet: a blockage there can produce the same fault code without the pressure switch being faulty.
- 03
Some days it starts on the first try, and other days it requires several attempts.
Cause: It is typical for a microswitch or a diaphragm to start failing intermittently before they completely stop switching.
Note if the faults coincide with humidity or cold; condensation in the connection pipes gives the same symptoms and does not require changing the part.
- 04
The boiler starts well but stops by itself in the middle of a heating cycle.
Cause: If the pressure switch loses contact with the burner once it's already ignited, the control unit shuts down just like during startup, following the same safety logic.
With the boiler cold, disconnect the silicone tubes and blow through them to rule out a partial blockage before replacing the pressure switch.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| 02 | Air flow fault | The flue pressure switch does not switch on start-up (does not detect the pressure differential) due to a faulty diaphragm/micro or blocked hoses/venturi; the PCB interprets a lack of draft and triggers the 02. Check continuity at its terminals with the fan running and inspect the pressure tubes and flue exhaust. |
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 Saunier Duval Pressure Switch 0020048295
- Catalogue reference
- 0020048295
- Brand
- Saunier Duval
- Type of part
- Pressure switches
- Units in stock
- 4 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- Part code
- 605.99065
- Pressure differential (open/close)
- 48/35 Pa
- Electric charge
- 1(0.5)A / 250V~
Frequently asked questions about the pressure switch 0020048295
Should I order reference 0020004013 or 0020048295 for the Isotwin F 35 H-MOD?
What pressure differential does the pressure switch 605.99065 of the Isomax Condens F 35 E have?
Is this Huba Control pressure switch also suitable for the Isomax Condens F 35 H-MOD?
What electrical contact does the pressure switch 605.99065 of the Isomax/Isotwin F 35 H-MOD support?
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