Junkers Air Pressure Switch ZWSB 22/28-3, ZWSE 24-5 MFA and MFK Huba Control Ref. 8716771261
Differential air pressure switch, part code 605.99550 and reference 8716771261 according to the label, for Junkers boilers ZWSB 22/28-3, ZWSE 24-5 MFA, and ZWSE 24-5 MFK. It detects the air pressure difference in the flue/fan circuit and shuts down the operation if it is not correct, preventing the boiler from starting without safe combustion. It is replaced when there is an air pressure or fan error.
VAT included
Consult via WhatsAppJunkers boilers compatible with reference 87167715800
Pressure switch with reference 87167715800. Two confirmed compatibilities: ZWC 28/32-1MFA 23 and ZWC28-1MF2A 23.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers ZWC 28/32-1MFA 23 | Junkers Euromaxx ZWC | Contrasted |
| Junkers ZWC28-1MF2A 23 | Junkers Euromaxx ZWC | 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. 87167715800 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 87167715800. 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 87167715800 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 does not start and locks out showing an air pressure or fan fault.
Cause: The differential pressure switch does not detect the pressure difference generated by the fan and does not allow the ignition.
Check that the fan starts and sounds normal before assuming that the pressure switch is the problem.
- 02
An error code related to the pressure switch or the flue fan appears on the screen.
Cause: The PCB associates that code with not receiving the correct pressure confirmation from the pressure switch.
Note the exact code and consult the fault manual of the boiler before purchasing, to rule out that it is the fan.
- 03
The ignition attempts fail one after another, without the flame igniting.
Cause: Being a differential pressure switch, it needs to measure pressure at two points simultaneously; if one of the tubes fails, it will never provide the correct signal.
Check both connection tubes of the pressure switch, not just one, in case one is disconnected, crushed, or has water inside.
- 04
The boiler works well for a few days and then starts to intermittently lock out due to the same fault.
Cause: The pressure switch contact may start to fail gradually before completely stopping functioning.
Keep a record of when the fault occurs, in cold conditions, with wind, or after prolonged use, as it helps to confirm if the pattern fits a faulty pressure switch.
Fault codes from Junkers that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| C4 | The pressure switch does not open in the rest position. | The air differential pressure switch remains closed at rest due to an internal fault or water/dirt in the tubes, so the control board "sees" it as activated; check continuity at rest with a multimeter and inspect/clean tubes and venturi inlets. |
| C6 | The pressure switch does not close. | With the fan running, the pressure differential is not reached, or the pressure switch (membrane/micro) fails and does not close; check closure by applying vacuum with a vacuum gauge or acting on the connection while measuring continuity, and inspect tubes, venturi, and extractor. |
| C1 | The pressure switch has activated during operation. | During full combustion, the pressure switch opens due to an internal fault or a momentary loss of depression in the air/flue circuit; check the stability of the contact by measuring continuity during the cycle and inspect silicone tubes, venturi, and condensate drain. |
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.
Datasheet for Junkers pressure switch 87167715800
- Catalogue reference
- 87167715800
- Brand
- Junkers
- Type of part
- Pressure switches
- Units in stock
- 1 unit
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- 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.
- Part code
- 605.99550
- Reference (corrected)
- 8716771261 (printed as '8-716-771-261')
- Differential pressure
- 55/45 Pa
- Current / voltage
- 1(0.5) A / 250 V~
- Batch
- KRTAEE
Frequently asked questions about the pressure switch 87167715800
What is the correct reference for the pressure switch of the Junkers ZWSB 22/28-3?
Does Huba Control manufacture the pressure switch for the Junkers ZWSE 24-5 MFA?
Is it an air pressure switch or a water pressure switch that the Junkers ZWSE 24-5 MFK uses?
What fault indicates that the pressure switch of the Junkers ZWSB 22/28-3 needs to be replaced?
What is the differential pressure of the pressure switch for the Junkers ZWSE 24-5 MFA?
What is the part code for the pressure switch of the Junkers ZWSE 24-5 MFK?
Spare parts related to Junkers Junkers Euromaxx ZWC
