Gas Valve Isofast C 35 E-A - Honeywell VK8525M - Ref. 4000 124 345

Saunier Duval boilers compatible with reference S1071500

Gas valve with reference S1071500. 28 verified compatibilities: C24E and C25E.

Proven compatibility

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. S1071500 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.

1. Find the reference printed on the installed part and check whether it matches the catalogue reference S1071500. If it is not visible, do not identify the part from its shape alone.
2. Check the full boiler model on its data plate and look for it in the model associations on this page.
3. Compare the connections and physical body with the original part before installation.
4. If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.

Symptoms and faults that the gas valve S1071500 resolves.

The gas valve regulates and modulates the gas flow to the burner. These are the typical symptoms and what to do:

Common symptoms and faults

• 01

  The boiler does not ignite even after you reset it.

  Cause: If the gas valve does not open, no gas enters the burner and ignition does not occur.

  Check if another gas appliance in the house is working properly to rule out a supply cut before inspecting the gas valve.

• 02

  The boiler starts up well but turns off by itself during operation.

  Cause: An intermittent fault in the coil or a poor connection in the connector can interrupt the gas flow while the boiler is running.

  Check that the electrical connectors of the gas valve are properly tightened and free of rust; a loose connection can cause symptoms similar to those of a faulty valve.

• 03

  There is a smell of gas near the gas valve.

  Cause: This can happen if the internal shutter does not seal properly and causes a small constant leak.

  With the boiler turned off, apply soapy water to the inlet and outlet connections of the gas valve to identify the exact point of the leak.

• 04

  The display shows a flame fault or error after attempting to ignite it.

  Cause: The control board does not receive confirmation that gas is flowing and the flame is stable, and it locks out for safety.

  First, check the ignition electrode and the spark transformer; a weak spark can cause the same fault as a gas valve that does not open.

Fault codes from Saunier Duval that this spare part resolves.

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 Saunier Duval gas valve S1071500.

Catalogue reference

S1071500

Brand

Saunier Duval

Type of part

Gas valves

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.

type

VK8525M

reference

4000 124 345

output pressure

2.15 mbar

maximum pressure

60 mbar

coil voltage

24 VDC

coil consumption

6 VA

V1

22 Vdc (4VA)

V2

24 Vdc (6VA)

class

B+B

group

1

gas

NATURAL GAS

protection rating

IP 20

country of manufacture

Made in Czech Republic

date/batch code

202/04

Manuals and technical documentation

Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.

• Saunier Duval Thematek F24E Manual (PDF)Document © Saunier Duval, provided as a technical reference.