Flow Detector Saunier Duval Isofast F 30 EA 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

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 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 and faults that the flow meter S5720200 resolves.

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 for either heating or domestic hot water, as if it does not detect the tap being open.

  Cause: The flow detector does not close the contact, and the boiler understands that there is no water flowing, so it does not allow ignition.

  Check the pressure of the installation and make sure there is no clogged inlet filter before declaring the part faulty.

• 02

  The water comes out in bursts, heating up and cooling down repeatedly in short intervals.

  Cause: A detector with unstable readings causes the boiler to intermittently turn the burner on and off.

  Bleed the air from the circuit and check the pressure of the installation before changing the part.

• 03

  It only fails with the domestic hot water, and the heating works fine.

  Cause: The flow detector is usually located in the domestic hot water line, so a fault in it only affects that service.

  Test with different tap flow rates to see if the fault depends on the amount of water before replacing the part.

• 04

  The fault appears intermittently, with no clear relation to anything.

  Cause: It is typical of a detector whose mechanism begins to degrade due to wear or internal dirt.

  Note when it fails exactly (at startup, after a pause, with low flow) to confirm the pattern before requesting the spare part.

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

Brand

Saunier Duval

Type of part

Flow detectors

Units in stock

6 units

Status

Refurbished

Warranty

1 year

Shipping

Delivery time shown at checkout

Return

14 days

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.