How do I know if this pressure sensor is the one for my boiler?

Verify the reference 125109100 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part. It is a Baxi (Baxi Roca) part.

The pressure sensor measures the water pressure of the circuit for the electronics.

Which models is it suitable for?

Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.

Installation and recommendations

Check the connector and the gasket.

What does refurbished mean and what coverage does it have?

Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

What does fault code 118 mean on a Baxi?

Pressure too low in the hydraulic circuit. The water pressure sensor (ref. 125109100) may give a reading lower than the actual one due to drift/electrical fault, causing a lockout with 118 even if the pressure gauge shows 1–1.5 bar; verify by comparing the P05 value (pressure on display) with the pressure gauge and measuring the sensor signal or testing with a replacement.

RefurbishedBaxi Pressure sensors

Water Pressure Sensor Baxi Neodens Plus 28 28F Ref. 125109100

Name: Water Pressure Sensor Baxi Neodens Plus 28 28F Ref. 125109100
Brand: Baxi
SKU: SPPBNP28/28F
Price: 10 EUR
Availability: InStock

10 €VAT includedIn stock · 1 unit

Pressure sensor: refurbished spare part that measures water pressure for the electronics. Useful if there is a pressure fault even though the pressure gauge reads correctly. Compatible with Neodens Plus 24/24 F, Neodens Plus 28/28 F, Neodens Plus ECO 24/24 F (ref. 125109100). Includes a one-year warranty and delivery within 2–4 working days in the EU.

Consult via WhatsApp

Not sure if it's your part? Send us a photo of the screen printing via WhatsApp and we'll confirm compatibility before you purchase.

Delivery in 2–4 working days

1-year warranty

14-day return

Technical support

Key Data

Reference: 125109100
Brand: Baxi
Type of part: Pressure sensors
Available units: 1 unit in stock
Status: Refurbished
Warranty: 1 year
Shipping: 2–4 working days (EU)
Return: 14 days

The same part (ref. 125109100) equips these models. Verified compatibility; check the reference before purchasing.

Baxi Roca

Neodens Plus 24/24 F
Neodens Plus 28/28 F
Neodens Plus ECO 24/24 F
Neodens Plus ECO 28/28 F
Neodens Plus ECO 33/33 F
Platinum Compact 24/24 F
Platinum Compact 28/28 F
Platinum Plus 24/28/32 AF
Platinum Max Plus 24/28/33/40 F
Bios Plus 50 F
Bios Plus 70 F
Bios Plus 90
Bios Plus 110
Power HT Plus

Fault codes related to this part (not the entire boiler). They usually have more possible causes: first rule out electrodes, wiring/connections, and gas supply. Verified with ≥3 sources.

Code	What does it mean?	Cause and diagnosis (this part)
118	Pressure too low in the hydraulic circuit.	The water pressure sensor (ref. 125109100) may give a reading lower than the actual one due to drift/electrical fault, causing a lockout with 118 even though the pressure gauge shows 1–1.5 bar; verify by comparing the P05 value (pressure on display) with the pressure gauge and measuring the sensor signal or testing with a replacement.

How do I know if this pressure sensor is the one for my boiler?: Verify the reference 125109100 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part. It is a Baxi (Baxi Roca) part.
What is it used for?: The pressure sensor measures the water pressure of the circuit for the electronics.
Pressure fault even though the pressure gauge reads correctly?: The sensor is not transmitting the correct pressure to the PCB.
Which models is it suitable for?: Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.
Installation and recommendations: Check the connector and the gasket.
What does refurbished mean and what coverage does it have?: Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

Water Pressure Sensor Baxi Neodens Plus 28 28F Ref. 125109100

Key Data

Baxi Roca

Related Spare Parts Boiler Neodens Plus 28 28F