Saunier Duval Flow Meter Flow Detector Themafast NOx F30 B 20 Ref. S5720200

Saunier Duval boilers compatible with reference S5720200

Flow meter with reference S5720200. 33 confirmed compatibilities: ThemaClassic C24E and ThemaClassic C25E.

Verified 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. S5720200 is the part for your boiler

The part reference, model, and equipment revision must be verified against the manufacturer's documentation.

1. Find the reference printed on the installed part and check whether it matches the catalogue reference S5720200. 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 that require diagnosis in the flow meter S5720200

The flow meter detects the passage of water to activate the domestic hot water. These are the typical symptoms and what to do:

Common symptoms and faults

• 01

  The boiler does not provide domestic hot water even though there is gas and the pressure is correct.

  Cause: The flow detector does not detect the passage of water, so the PCB does not receive the command to turn on the burner.

  Measure the pressure of the installation on the manometer; if the pressure is low, the problem may not be with the detector.

• 02

  The burner does not ignite when a tap is opened, but the heating works fine.

  Cause: This component only affects the domestic hot water circuit, so its fault does not impact the heating, which makes it easier to identify the problem.

  Check that the fault occurs in all the taps in the house and not just in one.

• 03

  The hot water comes out intermittently, appearing and disappearing for no apparent reason.

  Cause: An unstable flow causes the PCB to modify the operation of the burner erratically, turning it on and off.

  Check if the cold water inlet filter is clean; a partial blockage can cause this issue.

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 S5720200 flow meter

Catalogue reference

S5720200

Uniclima internal SKU

DFCTNF30B2

Brand

Saunier Duval

Type of part

Flow detectors

Units in stock

3 units

Status

Refurbished

Warranty

1 year

Shipping

Delivery time shown at checkout

Return

14 days

Part data and available documentation

Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.

Relief code, line 1 (tab)

0000103519000

Relief code, line 2 (tab)

1471320401410

Manuals and technical documentation

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

• Saunier Duval Thema Nox F25 Manual (PDF) Document © Saunier Duval, provided as a technical reference.