Grundfos Circulating Pump UPS15-60 RLE Junkers Euromaxx ZWC 28/32-1 MFA Ref. 8716771427
Circulating pump of the boiler circuit, manufactured by Grundfos (model UPS15-60 RLE) although the outer casing is branded Bosch. It fits in Junkers Euromaxx ZWC/ZWSE and NGVM24-5 boilers. The replacement requires first confirming the fault of the part through technical diagnosis, even when it does not start, makes noise, or the boiler stops heating. Catalog reference 8716771427, equivalent to the one engraved on the motor, 8716771386.
- Type of part
- Pumps
- Status
- Refurbished
- Catalogue reference
- 8716771427
- Warranty
- 1 year
Junkers boilers compatible with reference 8716771427
Circulating pump with reference 8716771427. A proven compatibility: ZWC 24-1 MF2A.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers ZWC 24-1 MF2A | 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. 8716771427 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 8716771427. 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 circulation pump 8716771427
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 pump makes a buzzing sound but the shaft does not move.
Cause: The rotor is stuck, which usually happens if the boiler has been inactive for several weeks.
Disconnect the boiler and try to turn the shaft manually using the front screw of the motor; if it moves, test the installation before purchasing the part.
- 02
The radiators do not heat up even though the burner ignites and turns off normally.
Cause: The water does not circulate because the impeller is not spinning or there is air in the circuit.
Bleed the radiators and the pump bleeder before deciding that the circulator is faulty.
- 03
A constant vibrating or gurgling noise is heard in the area of the pump.
Cause: It is usually trapped air in the impeller or cavitation due to low pressure in the system.
Measure the pressure of the circuit on the manometer: if it is below 1 bar, adding water may eliminate the noise without touching the pump.
- 04
There is moisture or dripping between the motor and the pump body.
Cause: The mechanical seal has worn out and does not seal properly.
Check if the leak comes from the shaft or from a nearby joint: only shaft wear justifies replacing the entire pump.
Junkers fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| E9 | The STB has been activated. | If the circulating pump is blocked or has no flow, the primary overheats and triggers the safety limiter (STB); check by powering the Grundfos UPS 15-60 RLE, confirming rotation/consumption and bleeding the circuit to remove air. |
| AA | Excessive temperature difference between the heating flow circuit and the domestic hot water. | A stopped/blocked pump causes a large ΔT between flow and DHW; check start-up in test mode, flow through bypass, and ensure the rotor is not jammed and there is no air in the system. |
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 8716771427 circulation pump.
- Catalogue reference
- 8716771427
- Uniclima internal SKU
- MBJEZWC28/32
- Brand
- Junkers
- Type of part
- Pumps
- Units in stock
- 2 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.
- Model
- UPS15-60 RLE
- Reference engraved on the motor
- 8716771386 (Grundfos)
- Part number (P/N)
- 59806402
- Nominal voltage
- 230V ~ 50Hz
- Condenser
- 2.5 µF
- Protection rating
- IP44
- Thermal class
- H (TF 95)
- Maximum pressure
- 3 bar
- Power speed 1
- 45 W (0.21 A)
- Power speed 2
- 75 W (0.34 A)
- Power speed 3
- 95 W (0.41 A)
- The outer casing bears the BOSCH brand, but the motor is identified with the GRUNDFOS logo and numbering: the actual manufacturer of the part is Grundfos, not Bosch.
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Junkers ZWC 24-1 MF2A manual (PDF)Document © Junkers, provided as a technical reference.
Frequently asked questions about the circulator pump 8716771427
Is this Grundfos UPS15-60 RLE pump suitable for the Junkers NGVM24-5?
How many speeds does this pump of the Euromaxx ZWC 24/28-1 MFA have?
What is the maximum pressure that the pump of the ZWC 28/32-1 MFA can withstand?
