Grundfos UPS15-60 pump · 59936506 / 8707204036 · Euroline ZW23 AE / ZS23 AE with FD ≥ 287
It moves the water from the boiler through the circuit. It is suspected if the radiators do not heat even though the boiler turns on, if it makes noise or vibrates, or if it leaks water from the body. A technician must check it.
- Type of part
- Pumps
- Status
- Refurbished
- Catalogue reference
- 59936506
- Warranty
- 1 year
compatible with reference 59936506
Circulating pump with reference 59936506. Two confirmed compatibilities: Bosch/Junkers Euroline ZW23AE, FD ≥ 287 and Bosch/Junkers Euroline ZS23AE, FD ≥ 287. There are 4 other models that we are still verifying.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Bosch/Junkers Euroline ZW23AE, FD ≥ 287 | Bosch/Junkers | Contrasted |
| Bosch/Junkers Euroline ZS23AE, FD ≥ 287 | Bosch/Junkers | Contrasted |
Models pending verification
These models are associated with this reference, but we have not finished verifying them yet, so we do not consider them compatibleIf your boiler is one of them, send us a photo of the part you are going to replace and we will verify it before you purchase.
| Bosch/Junkers Junkers Euroline ZS23 KE23 | Bosch/Junkers | Unconfirmed |
|---|---|---|
| Bosch/Junkers Junkers Euroline ZW23 KE23 / KE31 and ZS23 KE31 | Bosch/Junkers | Unconfirmed |
| Bosch/Junkers Junkers Euroline ZW23 KE23 SO | Bosch/Junkers | Unconfirmed |
| Bosch/Junkers Junkers OW / OS (family "ab FD287") and GLM/GVM23-2 | Bosch/Junkers | Unconfirmed |
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 reference 59936506 is the part for your boiler
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Read the label of the pump: it should say UPS15-60 CACAO, P/N 59936506 and the code 8707204036.
- Check the FD of your boiler: the official parts list assigns 8707204036 to the ZW23 AE and ZS23 AE with FD ≥ 287; with FD ≤ 286 it is another pump, 8717204348.
- Compare the Bosch/Junkers reference 8707204036. Some write it as J8707204036 or 87072040360 (Bosch ETK: 8 707 204 036 0).
- To confirm: Do not confuse it with other UPS 15-60: the P/N 59936518 is a CACAO for Worcester, and the 23-1 KE uses the 8707204042.
- If they match, call us at 911 17 77 77 with the model of your boiler.
Symptoms that require diagnosis in the circulation pump 59936506
The circulation pump circulates the water in the heating circuit. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
Cold radiators even though the boiler ignites and burns gas.
Cause: To confirm: for this pump. Have a technician check if the water is circulating.
- 02
Excessive noise or vibration during operation.
Cause: Signal cited by the same.
- 03
Stuck rotor after a long summer shutdown.
Cause: It is recorded as a typical fault of this pump.
- 04
Visible water leaks on the body of the pump.
Cause: Cited signal by.
- 05
The boiler turns off shortly after being turned on, with the reset button pressed and the LED flashing 45 °C.
Cause: Overheating: the temperature limiter has activated. There may be air in the system or the pump may be stuck.
Open the supply and return valves, bleed the system, and reset. If it happens again, have a technician unlock the pump shaft.
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.
Technical sheet: Bosch/Junkers 59936506 circulator pump
- Catalogue reference
- 59936506
- Uniclima internal SKU
- BOM027
- Brand
- Bosch/Junkers
- Type of part
- Pumps
- Units in stock
- 4 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.
- FD
- 0241VUL
- Power supply
- 230 V~
- Frequency
- 50 Hz
- Condenser
- 2.5 µF
- Protection
- IP44
- Thermal class
- TF95
- Insulation class
- H
- Maximum marked pressure
- 3 bar
- Current / power (I1/1, P1)
- 0.32 A / 70 W; 0.40 A / 90 W
- Manufacturer data — Weight
- 1,672 kg · Bosch ETK
- Manufacturer data — Barcode (EAN)
- 4010009925187 · Bosch ETK
- Pending applications to verify
- Statements from (documentation 23/10/2026; revision 24/10/2026), pending confirmation by the manufacturer. Check reference, revision, and serial number before use: ZS23 AE23 S2805 · ZS23 AE31 S2805 · ZS23 KE23 S2895 · ZS23 KE31 S2895 · ZW23 AE23 S2805 · ZW23 AE31 S2805 · ZW23 KE23 S2895 · ZW23 KE23 SO S2895 · ZW23 KE31 S2895
- To confirm: These signals come from the list, not from an official manual. A technician must confirm that the cause is the pump.
- To confirm: Junkers Euroline ZS23 KE23 — ETK from Bosch (ZS23KE23S5095); the catalog 23-1 KE (2005) gives 8707204042: compare model and FD.
- To confirm: Junkers Euroline ZW23 KE23 / KE31 and ZS23 KE31:
- To confirm: Junkers Euroline ZW23 KE23 SO
- To confirm: Junkers OW / OS (family "ab FD287") and GLM/GVM23-2 — 1 source: ETK from Bosch (usage note), to confirm.
- Not compatible or excluded at source: Junkers Euroline ZW23 AE / ZS23 AE with FD ≤ 286 — They have a different pump: 8717204348 (official parts list, pos. 6)
- Do not confuse: 8707204042 — Pump for the ZW/ZS 23-1 KE (official catalog from 2005) — It is a different pump, not the 8707204036 from this label.
- Do not confuse: 59936518 — UPS 15-60 CACAO with another P/N in English, for Worcester — It differs by two digits from the 59936506 on this label: compare them.
- ZW23 AE and ZS23 AE (FD ≥ 287): official breakdown from Bosch and by 8707204036. P/N 59936506 from the label, confirmed; without additional external confirmation read it collects.
Frequently asked questions: 59936506 circulator pump
How do I identify this Grundfos UPS15-60 CACAO pump?
Is it compatible with my Junkers Euroline ZW23 AE or ZS23 AE boiler?
What is the difference between 8707204036, 87072040360, and J8707204036?
In which other boilers is 8707204036 used?
Is it a Grundfos or Bosch pump, and is any UPS 15-60 compatible?
What symptoms point to this pump?
Who should install it and what is checked when replacing it?
