Flow meter Saunier Duval Isofast C 35 E 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 domestic hot water is not heating even when the tap is left open, but the heating is working fine.

  Cause: The flow meter does not send the water flow signal and the boiler does not activate the burner for domestic hot water.

  Measure the actual flow rate with a container and a stopwatch: if it is below normal, check filters and valves before the sensor.

• 02

  The burner takes several seconds to ignite or does not ignite when requesting domestic hot water.

  Cause: The sensor shaft rotates with difficulty due to internal dirt and does not reach the trigger point in time.

  Locate the flow meter in the domestic hot water circuit and visually check if it spins correctly when the tap is opened.

• 03

  The temperature of the hot water fluctuates erratically while you are using it.

  Cause: The signal from the sensor is unstable and the modulation of the burner responds to false flow changes.

  Check if the fault occurs when using other taps or appliances that reduce the pressure of the system.

• 04

  The boiler shows a warning of lack of flow or water with the tap open and normal pressure.

  Cause: The control board does not receive the expected pulse from the sensor and assumes that there is no water, even though there is.

  Before changing the part, make sure that the main inlet valve is fully open and that there are no restrictions upstream.

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

CISDC35E

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

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.