How do I know if this pressure switch is for my boiler?

Verify the reference 05261500 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.

The pressure switch controls the pressure/draught (of air in sealed systems) or water to authorize operation.

Is the boiler not starting or showing a draught fault?

If the fan spins but does not ignite, check the pressure tubes (loose/blocked), the diaphragm, and the fan.

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 tightness of the pressure pipes and the switching of the contact.

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.

RefurbishedSaunier Duval Pressure switches

Saunier Duval Water Pressure Switch Safety Thelia AS 23 Ref. 05261500

Name: Saunier Duval Water Pressure Switch Safety Thelia AS 23 Ref. 05261500
Brand: Saunier Duval
SKU: PSTAS23
Price: 15 EUR
Availability: InStock

15 €VAT includedIn stock · 5 units

Pressure switch: refurbished spare part that controls air or water pressure to authorize operation. Useful if the boiler does not start or shows a draft error. Compatible with Combitek C 23, Combitek C 23 E, Combitek F 23 (ref. 05261500). 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: 05261500
Brand: Saunier Duval
Type of part: Pressure switches
Available units: 5 units in stock
Status: Refurbished
Warranty: 1 year
Shipping: 2–4 working days (EU)
Return: 14 days

The same part (ref. 05261500) equips these models. Verified compatibility; check the reference before purchasing.

Combitek

Combitek C 23
Combitek C 23 E
Combitek F 23
Combitek F 23 E

Thelia

Thelia 23
Thelia 23 E
Thelia 623
Thelia 623 E
Thelia AS 23

Thema

Thema C 23
Thema C 23 E
Thema F 23
Thema F 23 E

Themaplus

Themaplus C 23 E
Themaplus F 23 E

Themis

Themis 23 E
Themis 23 ME
Themis AS 14
Themis AS 23

How do I know if this pressure switch is for my boiler?: Verify the reference 05261500 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.
What is it used for?: The pressure switch controls the pressure/draught (of air in sealed systems) or water to authorize operation.
Is the boiler not starting or showing a draught fault?: If the fan spins but does not ignite, check the pressure tubes (loose/blocked), the diaphragm, and the fan.
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 tightness of the pressure pipes and the switching of the contact.
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.