Saunier Duval Isofast F 30 E H Air Pressure Switch MOD Ref. S5744100
RefurbishedSaunier DuvalPressure switches

Saunier Duval Isofast F 30 E H Air Pressure Switch MOD Ref. S5744100

25 €VAT includedIn stock · 20 units

Pressure switch: refurbished spare part that controls air or water pressure to authorize operation. Useful if the boiler does not start or shows a draft error. Compatible with F 30 E H-MOD, F 35 E1, F 35 E H-MOD (ref. S5744100). Includes a one-year warranty and delivery within 2–4 working days in the EU.

1
Consult via WhatsApp
Delivery in 2–4 working days
1-year warranty
14-day return
Technical support

Key Data

Reference
S5744100
Brand
Saunier Duval
Type of part
Pressure switches
Available units
20 units in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. S5744100) equips these models. Verified compatibility; check the reference before purchasing.

Isofast

  • F 30 E H-MOD
  • F 35 E1
  • F 35 E H-MOD

Isomax

  • F 28 E2

Isotwin

  • F 28 EA
  • F 30 E H-MOD

Isosplit

  • F 30 E
  • F 35 E
  • F 35 E H-MOD

Themafast

  • F 25 E
  • F 25 E H-MOD
  • F 30 E
  • F 30 E H-MOD

Thema

  • F 25 E
  • F 25 E STL
  • F AS 25 E

Themaplus

  • F 25 E
  • F 30 E

Themaclassic

  • F AS 30 E

Opalia

  • F 17 E

Opaliafast

  • F 17 E

Fault codes related to this part (not the entire boiler). They usually have more possible causes: first rule out electrodes, wiring/connections, and gas supply. Verified with ≥3 sources.

CodeWhat does it mean?Cause and diagnosis (this part)
02Air flow safety.The air pressure switch S5744100 does not switch when the fan starts or does not detect the depression due to obstruction in tubes/venturi; check with a multimeter or manometer that the pressure switch changes state with the fan running and inspect tubes and connections.
What is this pressure switch used for?
In sealed boilers, it monitors the pressure/draught of the flue circuit: it confirms that the fan and the exhaust are functioning before authorising ignition (draught safety). The water one monitors the pressure of the circuit.
How do I know it's from my boiler?
Check the reference S5744100 and ensure your model is on the list of compatibles; compare the set pressure, the pipe connections, and the connector. It is usually a DIFF pressure switch (aftermarket).
My boiler won't start or shows a draught fault, is this it?
It could be: if the fan spins but the boiler does not ignite and shows a draft/ventilation fault, check the pressure tubes (loose/blocked), the pressure switch diaphragm, and the fan itself before replacing.
Which models is it suitable for?
Part shared by various models (see Compatibility). If your model does not appear, send us a photo and we will confirm it.
How is it checked?
With the boiler in demand and the fan running, the switching of the contact and the tightness of the pressure tubes are checked. A technician can measure the continuity of the microswitch.
What does refurbished mean and what coverage does it have?
Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

Related Spare Parts Boiler Isofast F 30 E H MOD

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