Saunier Duval Isofast F35 E Air Pressure Switch Ref. 05733900
RefurbishedSaunier DuvalPressure switches

Saunier Duval Isofast F35 E Air Pressure Switch Ref. 05733900

25 €VAT includedIn stock · 5 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 Isofast F30 E, Isofast F30 EH, Isofast F35 E1 (ref. 05733900). 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
05733900
Brand
Saunier Duval
Type of part
Pressure switches
Available units
5 units in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. 05733900) equips these models. Verified compatibility; check the reference before purchasing.

Isofast

  • Isofast F30 E
  • Isofast F30 EH
  • Isofast F35 E1
  • Isofast F35 E H-MOD

Themafast

  • Themafast F25 E
  • Themafast F25 E H-MOD
  • Themafast F30 E
  • Themafast F30 E H-MOD

Isotwin

  • Isotwin F28 E-A
  • Isotwin F30 H-MOD

Themaclassic

  • Themaclassic F AS 30 E

Thema

  • Thema F25 E STL

Opalia

  • Opalia F17 E
  • Opaliafast F17 E

Isomax

  • Isomax F28 E2

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)
F2Safety Flue Terminal (SFT) or pressure switch.The air pressure switch does not switch when the fan starts (does not close the circuit) due to loss of sensitivity, damaged diaphragm, or blocked pressure switch/venturi ports/tubes; check by applying controlled vacuum and measuring continuity at contacts, and inspecting tubes and electrical connection.
F33Air flow fault.The air pressure switch detects a lack of depression/flow (open or blocked contact), usually due to a defective pressure switch or dirty connections/venturi/pipes; check with a switching test (applying depression) and reading the state, and inspect/clean the connections and wiring.
How do I know if this pressure switch is for my boiler?
Verify the reference 05733900 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.
What is it used for?
The pressure switch controls the pressure/draught (of air in sealed systems) or water to authorize operation.
Is the boiler not starting or showing a draught fault?
If the fan spins but does not ignite, check the pressure tubes (loose/blocked), the diaphragm, and the fan.
Which models is it suitable for?
Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.
Installation and recommendations
Check the tightness of the pressure pipes and the switching of the contact.
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 F35 E

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