Pressure Switch Boiler Junkers Cerapur Ref. 8716106633
The Junkers Cerapur boiler pressure switch controls the air or water pressure, allowing the boiler to operate correctly. If it malfunctions, you will notice that the boiler does not start or gets locked, even if the pressure is correct. This component is compatible with several models, such as ZSB14-4C21, ZSB14-4C23, and ZWB25-2C23, among others. A technician must confirm through diagnosis whether it needs to be replaced when fault codes C1, C4, or C6 are detected.
- Type of part
- Pressure switches
- Status
- Refurbished
- Catalogue reference
- 8716106633
- Warranty
- 1 year
Junkers boilers compatible with reference 8716106633
Pressure switch with reference 8716106633. 16 verified compatibilities: ZSB14-4C21 and ZSB14-4C23.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers ZSB14-4C21 | ZSB14-4C21 | Contrasted |
| Junkers ZSB14-4C23 | ZSB14-4C23 | Contrasted |
| Junkers ZSB24-4C21 | ZSB24-4C21 | Contrasted |
| Junkers ZSB24-4C23 | ZSB24-4C23 | Contrasted |
| Junkers ZWB25-2C23 | ZWB25-2C23 | Contrasted |
| Junkers ZWB25-2C31 | ZWB25-2C31 | Contrasted |
| Junkers ZWB28-3CE23 | ZWB28-3CE23 | Contrasted |
| Junkers ZWB28-3CE31 | ZWB28-3CE31 | Contrasted |
| Junkers ZWBC24-2C23 | ZWBC24-2C23 | Contrasted |
| Junkers ZWBC24-2C31 | ZWBC24-2C31 | Contrasted |
| Junkers ZWBC25-2C23 | ZWBC25-2C23 | Contrasted |
| Junkers ZWBC25-2C31 | ZWBC25-2C31 | Contrasted |
| Junkers ZWBC28-2C23 | ZWBC28-2C23 | Contrasted |
| Junkers ZWBC28-2C31 | ZWBC28-2C31 | Contrasted |
| Junkers ZWBC30-2C23 | ZWBC30-2C23 | Contrasted |
| Junkers ZWBC30-2C31 | ZWBC30-2C31 | 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 the ref. 8716106633 is the part for your boiler
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 8716106633. 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 that require diagnosis in the pressure switch 8716106633
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 ignite and gets locked as soon as it tries to start.
Cause: The pressure switch does not detect the necessary combustion pressure, and the control board interrupts the cycle for safety.
Check that the extractor is working properly and that the tubes or connections of the pressure switch are well tightened before replacing the part.
- 02
A pressure switch error is displayed.
Cause: The boiler alerts when the pressure switch does not close the contact within the time expected by the control board.
Note if the code always repeats the same; if it changes or is sporadic, check the condition of the flue duct.
- 03
The ignition is intermittent: sometimes it starts well and other times it gets blocked.
Cause: A loose connection or a small leak in the pressure circuit can send unstable signals to the pressure switch.
Check the connections and the condition of the pipes in the pressure circuit before replacing the pressure switch.
- 04
The fault has been appearing intermittently for some time, without a clear pattern.
Cause: A pressure switch that starts to fail does not always do so in the same way, which causes irregular lockouts that are difficult to identify in the workshop.
Keep a record of when the fault occurs (time, outside temperature, usage time) to determine if it is the pressure switch or another cause.
Junkers fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| C1 | The differential pressure switch has been activated during operation. | The air pressure switch opens its contact during operation due to a fatigued diaphragm, defective microswitch, or loss of vacuum in the circuit; it is checked by measuring continuity at the pressure switch terminals while the fan is running and inspecting the hoses/Venturi connections. |
| C4 | The differential pressure indicator does not open with the fan disconnected. | The air pressure switch remains stuck/closed (contacts adhered or false pressure due to incorrectly connected hoses); it is checked by cutting power to the fan and verifying that the pressure switch opens (no continuity), and testing its manual operation with a slight vacuum/pressure. |
| C6 | The differential pressure switch does not close. | The air pressure switch does not reach switching due to lack of depression (blocked tube/leak) or due to an internal fault of the pressure switch itself; it is checked by measuring continuity during start-up with the fan running and inspecting/probing hoses and pressure inlets. |
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.
Data sheet for the Junkers pressure switch 8716106633
- Catalogue reference
- 8716106633
- Uniclima internal SKU
- PCJC388
- Brand
- Junkers
- Type of part
- Pressure switches
- Units in stock
- 7 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- Reference engraved on the part
- 8-716-106-633
- Switching range / voltage
- 1(0.5)/230~
- Batch code
- XNGEB1
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Junkers ZWBC30-2C31 manual (PDF) Document © Junkers, provided as a technical reference.
Frequently asked questions about the pressure switch 8716106633
Is the pressure switch Ref. 8716106633 suitable for a Junkers Cerapur ZWB28-3CE23?
What fault does this pressure switch resolve in a Junkers Cerapur ZSB24-4C23 boiler?
How do I check if this pressure switch is the one for my Junkers Cerapur ZWBC25-2C31?
What voltage and switching range does the pressure switch of the Junkers ZWB25-2C23 have?
