Saunier Duval Isofast C 35 EA flow meter 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 heats well for heating, but the hot water takes a long time to arrive or does not come out hot.

  Cause: The flow meter does not detect the passage of water, so the boiler does not switch to domestic hot water mode even though the burner is available.

  Open the tap to maximum flow for a few seconds and see if the boiler reacts; a very low flow for another reason can also prevent the start-up.

• 02

  The hot water comes out in intervals, heating up and cooling down for no apparent reason while the tap is open.

  Cause: The internal contact of the sensor is intermittently lost, and the control board interprets demand cuts that do not exist.

  Check the flow meter connector: if it is loose or corroded, it may give erratic readings before replacing the part.

• 03

  The display shows a warning or fault code related to the flow rate or the domestic hot water sensor.

  Cause: The control unit has detected an out-of-range signal from the flow meter and blocks the production of hot water for safety reasons.

  Note the exact code and consult the boiler manual: some flow warnings refer to the general water pressure, not to the sensor.

• 04

  The heating works well, but the hot water does not start in any faucet in the house.

  Cause: If the fault affects all consumption points, the problem lies with the flow meter and not with the plumbing installation.

  Check at more than one tap before deciding: if only one is failing, the problem is not 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

Brand

Saunier Duval

Type of part

Flow detectors

Units in stock

7 units

Status

Refurbished

Warranty

1 year

Shipping

Delivery time shown at checkout

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.

Code engraved on the part

0001035190000

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.