Air Pressure Switch Junkers Cerastar ZWN24 7MFA Ref. 8716156744
RefurbishedJunkersPressure switches

Air Pressure Switch Junkers Cerastar ZWN24 7MFA Ref. 8716156744

30 €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 ZWN24-7MFA, ZWN25-7MFA, ZWN25-8MFA (ref. 8716156744). 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
8716156744
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. 8716156744) equips these models. Verified compatibility; check the reference before purchasing.

Cerastar

  • ZWN24-7MFA
  • ZWN25-7MFA
  • ZWN25-8MFA
  • ZWN30-8MFA

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 differential pressure switch has been activated during operation.The air pressure switch opens during the cycle (membrane/microcontact fatigued or unstable signal) and the PCB detects a pressure loss; check with a differential manometer and measure continuity between C–NO of the pressure switch with the fan running, also inspecting hoses and connections.
C4The differential pressure indicator does not open with the fan disconnected.The pressure switch contact remains stuck/closed when the fan is stopped (diaphragm seized or tubes obstructed); check that with the fan stopped the C–NO is open and that with slight depression/overpressure it switches correctly, as well as inspecting the hoses.
C6The differential pressure switch does not close.The pressure switch does not switch when the fan starts (internal fault or blocked pressure ports/hoses); check with a manometer and continuity C–NO during the fan start-up and inspect the connections to the fan/pitot ports.
How do I know if this pressure switch is for my boiler?
Verify the reference 8716156744 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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