Flow Detector (Flow Meter) For Thema, Isofast, Isomax - Ref. S5720200

Saunier Duval boilers compatible with reference S5720200

Flow meter with reference S5720200. 33 confirmed compatibilities: ThemaClassic C24E and ThemaClassic 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. 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 ignite the burner when the hot water tap is opened, even though there is mains pressure.

  Cause: The flow meter does not detect the flow of water and the PCB does not receive the command to start the production of domestic hot water (DHW).

  Turn on the tap to maximum flow and check if the boiler activates with more water pressure.

• 02

  The tap water is lukewarm or cold even though the heating works normally.

  Cause: The flow meter fault affects only the domestic hot water circuit, not the heating circuit.

  Check the cold water inlet filter in case dirt is reducing the flow below the minimum detection level.

• 03

  The boiler intermittently detects the demand for domestic hot water: sometimes it turns on and other times it doesn't.

  Cause: The turbine or the internal magnet of the flow meter moves irregularly, and the signal reaches the PCB intermittently.

  Check that there is no lime scale or debris accumulated in the duct that could slow down the turbine before replacing the part.

• 04

  There is no domestic hot water production even though the rest of the boiler ignites and heats the heating well.

  Cause: The flow meter is the one that informs the control unit that there is a demand for domestic hot water; if it doesn't send the signal, the boiler does not switch to that mode.

  Check that the three-way valve moves when the tap is opened before blaming the flow meter.

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

CCSDTNF25B1

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.

Embossed code (tab), line 1

0000103519000

Embossed code (tab), line 2

1471105330121D

Manuals and technical documentation

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

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