Ariston Microgenus 23 MFFI Air Pressure Switch Ref. 571651
RefurbishedAristonPressure switches

Ariston Microgenus 23 MFFI Air Pressure Switch Ref. 571651

15 €VAT includedIn stock · 1 unit

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 F23MFFI, GENUS30MFFI, LINDA23 (ref. 571651). 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
571651
Brand
Ariston
Type of part
Pressure switches
Available units
1 unit in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. 571651) equips these models. Verified compatibility; check the reference before purchasing.

Microgenus

  • F23MFFI

Genus

  • GENUS30MFFI

Beautiful

  • LINDA23

Codex

  • CODEX27

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)
E33Air pressure switch (flue pressure switch) closed before the ignition sequence.The pressure switch remains stuck/closed or there is a false differential due to blocked hoses/Venturi, indicating draft when the fan is not yet operating. Check with a differential manometer at test points and continuity of the pressure switch with the fan stopped.
E34The air pressure switch does not close when the fan operates.The pressure switch does not switch due to lack of ∆P (draught/fan) or defective diaphragm/contact. Check ∆P at chamber connections and ensure the pressure switch closes with the fan running; inspect hoses/Venturi and, if necessary, replace the pressure switch.
608Lack of flue pressure switch authorization with the fan running.The pressure switch does not close despite the fan being active (insufficient ∆P or faulty pressure switch). Check by measuring ∆P and continuity of the pressure switch during the fan's operation; inspect silicone tubes and venturi.
6P1Delay in the authorization of the flue/air pressure switch.Slow/intermittent switching of the pressure switch (contact or membrane fatigued) or ∆P that takes time to be reached. Graphically verify ∆P with a manometer and the pressure switch closing times from fan start-up.
6P2Air pressure switch opening during normal operation.The pressure switch opens intermittently due to an internal fault or momentary loss of ∆P (blocked hoses/venturi). Check the continuity of the pressure switch and stable ∆P with the fan at speed; inspect and clean inlets and tubes.
How do I know if this pressure switch is for my boiler?
Verify the reference 571651 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part. It is a Honeywell piece.
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.

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