Bosch Circulating Pump Type UP15-60 CESA02 P/N 59754502 For Junkers Euroline ZW23 AE23
The Bosch circulator pump Type UP15-60 CESA02 P/N 59754502 is responsible for moving water through the heating circuit in the Junkers Euroline ZW23 AE23 boiler. If it fails, you will notice cold radiators, strange noises, overheating, and possible blockages due to lack of circulation. The reset button may also start flashing twice per second, and the 45 °C indicator will light up, indicating that the temperature limiter has been activated due to overheating. This pump is compatible with other models in the Euroline ZW 23 and ZW 24 range, among others. It should be replaced when it shows operational faults or when the mentioned symptoms become evident.
VAT included
Consult via WhatsAppJunkers boilers compatible with reference 8717204348
Circulating pump with reference 8717204348. Four confirmed compatibilities: Euroline ZW 23 AE 23 and Euroline ZW 23-1 AE 23.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers Euroline ZW 23 AE 23 | Junkers Euroline ZW 23 | Contrasted |
| Junkers Euroline ZW 23-1 AE 23 | Junkers Euroline ZW 23 | Contrasted |
| Junkers Euroline ZW 24-1 E LH AE 23 | Junkers Euroline ZW 24 | Contrasted |
| Junkers NW 24-1 LH AE 23 | Junkers Euroline ZW 24 | 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. 8717204348 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 8717204348. 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 circulation pump 8717204348 resolves.
The circulation pump circulates the water in the heating circuit. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The heating is not heating or is heating little, although the domestic hot water is working normally.
Cause: If the pump does not circulate water through the heating circuit, the heat will not reach the radiators even if the rest of the boiler is functioning properly.
With the boiler requesting heating, check if the pump body vibrates or transmits heat; if it is cold and still, it is not rotating.
- 02
The pump makes more noise or vibrates more than usual, especially right at startup.
Cause: Air in the circuit or accumulated scale in the impeller disrupts the rotation, and this is noticeable as noise.
Bleed the heating circuit from the highest point of the installation before replacing the pump.
- 03
After a period of inactivity, such as summer or a vacation, the pump does not start.
Cause: The shaft gets stuck due to sediment when it remains stationary for a long time.
Locate the bleed screw in the center of the rotor and turn it with a flat screwdriver to try to free the shaft.
- 04
A water leak is observed in the area of the shaft or the base of the pump.
Cause: The mechanical seal loses tightness with use and allows water to pass through gradually.
Dry the area, let the boiler run for a while, and check if the humidity reappears right there before replacing the part.
Fault codes from Junkers that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| The reset button flashes 2 times per second (2 Hz) and the 45 °C indicator light flashes. | Temperature limiter activated due to overheating in the primary circuit. | If the circulating pump is seized or not providing flow, there is no circulation and the coil overheats, triggering the limiter. Check by freeing the shaft through the front plug of the pump, bleed the system, and ensure the pump receives 230 V and is rotating. |
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 circulator pump Junkers 8717204348
- Catalogue reference
- 8717204348
- Brand
- Junkers
- Type of part
- Pumps
- 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.
- Brand name
- Bosch
- Model (Type)
- UP15-60 CESA02
- Reference (P/N)
- 59754502
- Voltage
- 230V~
- Frequency
- 50Hz
- Degree of protection
- IP44
- Thermal class
- TF95 / Class H
- Secondary code
- 8 707 204 902
Frequently asked questions about the circulator pump 8717204348
Is the Bosch Type UP15-60 circulator pump CESA02 P/N 59754502 compatible with the Junkers Euroline ZW23 AE23?
Which boiler models are compatible with this pump?
What symptoms indicate that I need to replace the pump in my boiler?
What code should I look for on my pump's PCB to confirm that it is the correct one?
What fault codes are documented for this pump?
Where can I find more information about the compatibility of this pump?
Spare parts related to Junkers Euroline ZW 23
