Junkers Eurostar Air Pressure Switch ACU HIT Zwse 28 4 MFA Huba Ref. 8716761918
RefurbishedJunkersPressure switches

Junkers Eurostar Air Pressure Switch ACU HIT Zwse 28 4 MFA Huba Ref. 8716761918

35 €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 ZWSE 28-4 MFA, ZWSE 28-5 MFA (ref. 8716761918). 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
8716761918
Brand
Junkers
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. 8716761918) equips these models. Verified compatibility; check the reference before purchasing.

Junkers Eurostar ACU HIT

  • ZWSE 28-4 MFA
  • ZWSE 28-5 MFA

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)
C1The pressure switch opens during operation, or the fan speed is too low.If the air pressure switch opens during operation due to a faulty diaphragm/contact or loss of pressure at its connections, the control board detects a lack of air flow. Check continuity at the pressure switch terminals with the fan running and inspect/clean silicone tubes and venturi; if it does not switch within its threshold, replace it.
C4The pressure switch contact does not open.With the fan stopped, the pressure switch should open; if it remains stuck/closed (contact or membrane seized), the boiler locks out. Check that the contact switches to open with the fan stopped and that there are no obstructions in the tubes; if it persists, replace the pressure switch.
C6The contact of the pressure switch box does not close.When starting up, the fan must generate the vacuum for the pressure switch to close; if the pressure switch fails (membrane or microswitch) or does not reach the threshold due to dirt in inlets/tubes, it does not close and C6 appears. Verify the electrical closure of the pressure switch with the fan running and check/clean tubes and inlets; if it does not switch, replace it.
How do I know if this pressure switch is for my boiler?
Verify the reference 8716761918 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part. It is a Huba 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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