Chaffoteaux Pigma Green 25 Minimum Water Pressure Switch Ref. 65105090
Chaffoteaux Pigma incorporates the minimum water pressure switch Chaffoteaux Pigma Green 25, which is responsible for monitoring the water pressure in the boiler and authorizing its operation. If this part fails, you will notice that the boiler does not start or gets locked, even if the actual pressure is correct, which could display the fault code 108: Filling of the installation. This pressure switch is compatible with models such as Pigma Green 25, Alixia 24 FF, Clas 24 FF, Egis 24 FF, and AS 24 FF, among others. You should replace it when you experience these symptoms or if the boiler has starting issues.
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Consult via WhatsAppChaffoteaux boilers compatible with reference 65105090
Pressure switch with reference 65105090. Five confirmed compatibilities: Pigma Green 25 and Alixia 24 FF.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Chaffoteaux Pigma Green 25 | Chaffoteaux Pigma | Contrasted |
| Chaffoteaux Alixia 24 FF | Chaffoteaux Alixia | Contrasted |
| Chaffoteaux Clas 24 FF | Ariston Clas | Contrasted |
| Chaffoteaux Egis 24 FF | Ariston Egis | Contrasted |
| Chaffoteaux AS 24 FF | Ariston AS | 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 the ref. 65105090 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 65105090. 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 65105090 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, the fan activates, but it stops quickly and gets locked.
Cause: The pressure switch does not detect the air depression that confirms the exhaust is correct, and the control board cuts off the gas.
Check that the extractor spins without any strange noises and reaches its normal speed before replacing the part.
- 02
The display or the indicator shows a fault related to air or combustion and does not ignite.
Cause: It is the typical message when the pressure switch does not close the contact that the PCB expects before allowing the gas to flow.
Check the silicone tubes between the pressure switch, the venturi, and the flue: make sure they are not loose, bent, or filled with water.
- 03
In the condensing models of this range (Green), the fault mainly occurs after a period of operation in domestic hot water or heating.
Cause: The condensate generated by these models can accumulate in the pressure switch tube and alter the pressure signal.
Bleed and dry the connection pipes of the pressure switch before considering it faulty, especially if your boiler is a condensing model (Green).
- 04
The blockage is intermittent: sometimes it ignites properly and other times it shuts down immediately.
Cause: A worn internal contact due to use fails irregularly, not always the same.
Note whether the fault occurs when cold or only after being on for a while; this information helps to differentiate the pressure switch from other causes.
Fault codes Chaffoteaux that this part resolves
| Code | Fault | Diagnosis and solution |
|---|---|---|
| 108 | Filling the installation. | If the minimum water pressure switch (65105090) does not close or is stuck even though the system has pressure, the PCB detects a lack of water and triggers 108; check the pressure gauge (~1–1.5 bar), continuity of the pressure switch under pressure, and possible obstruction in its inlet/capillary. |
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.
Data sheet for the Chaffoteaux pressure switch 65105090
- Catalogue reference
- 65105090
- Brand
- Chaffoteaux
- Type of part
- Pressure switches
- Units in stock
- 7 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Chaffoteaux Pigma Green 25 Manual (PDF)Document © Chaffoteaux, provided as a technical reference.
Frequently asked questions about the pressure switch 65105090
Is this minimum water pressure switch PMCPG25 compatible with the Alixia 24 FF?
Does the minimum water pressure switch PMCPG25 work for the Pigma Green 25?
How many models are compatible with the pressure switch PMCPG25?
What fault code is documented for the pressure switch PMCPG25?
In what cases should the minimum water pressure switch PMCPG25 be replaced?
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