Pressure switch Hermann Micraplus NOx 24 B 2 Ref. 0020111755
The Hermann Micraplus NOX 24 B 2 boiler uses the pressure switch 0020111755, which checks the air pressure and authorizes the operation of the boiler. If this part fails, you will notice that the boiler does not start or gets locked, even if the actual pressure is correct, which can lead to fault code 33: Control cycle: the air pressure switch does not switch. This part is compatible with the Micraplus range, among others. It is recommended to replace the pressure switch when these symptoms occur or if it is faulty.
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Consult via WhatsAppHermann boilers compatible with reference 0020111755
Pressure switch with reference 0020111755. A proven compatibility: Micraplus NOX 24 B 2.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Hermann Micraplus NOx 24 B 2 | Hermann | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if ref. 0020111755 is the part for your boiler
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 0020111755. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms and faults that the pressure switch 0020111755 resolves.
The pressure switch controls the air or water pressure to authorize operation. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler starts the fan, tries to ignite, and shuts down by itself after a few seconds.
Cause: The pressure switch does not close the contact as it should, and the control board cuts off the gas for safety.
Make sure the fan doesn't make any strange noises or stop prematurely, with the cover removed and caution.
- 02
The boiler gets locked with a fault code related to air or flue gases.
Cause: The pressure switch detects less pressure than required and does not send the signal to continue with the ignition.
Check the flue gas outlet and the air intake duct for any obstructions before replacing the part.
- 03
The silicone tubes leading to the pressure switch are loose or have condensed water inside.
Cause: Dirty water or air reaching the pressure switch alters the pressure reading and causes intermittent lockouts.
Disconnect the pipes, blow through them, and check that there is no condensate before replacing the pressure switch.
- 04
The fault comes and goes: sometimes it starts up properly and other times it locks up for no apparent reason.
Cause: A worn contact inside the pressure switch operates inconsistently even though the air pressure is correct.
Reset several times in a row and note whether the fault is random or always occurs at the same point in the cycle.
Fault codes Hermann that this part solves
| Code | Fault | Diagnosis and solution |
|---|---|---|
| 33 | Control cycle: the air pressure switch does not switch. | The differential pressure switch for fumes does not close when the fan starts; check with a manometer/ohmmeter the switching of the pressure switch and ensure there are no obstructions/water in the inlets and flue duct. |
These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.
Hermann 0020111755 Pressure Switch Datasheet
- Catalogue reference
- 0020111755
- Brand
- Hermann
- Type of part
- Pressure switches
- Units in stock
- 3 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- Component code
- 605.99882
- Reference printed on the part
- 0020111755
- Pressure differential (open/close)
- 59/24 Pa
- Electrical load of the contacts
- 1(0.5) A / 250V~
- Batch
- KIOEHD
- Production code
- 47/13
Frequently asked questions about the pressure switch 0020111755
Is reference 0020111755 correct for the Hermann Micraplus NOX 24 B 2?
At what pressure does the pressure switch of the Hermann Micraplus NOX 24 B 2 switch?
What component code does the pressure switch of the Hermann Micraplus NOX 24 B 2 have?
When should the pressure switch of the Hermann Micraplus NOX 24 B 2 be replaced?
What contacts does the pressure switch of the Hermann Micraplus NOX 24 B 2 have?
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