Wilo Circulating Pump Motor ZRS15 4 1 KU Ref. 4516125
RefurbishedWiloPumps

Wilo Circulating Pump Motor ZRS15 4 1 KU Ref. 4516125

85 €VAT includedIn stock · 1 unit

Circulating pump: refurbished spare part that circulates water in the heating circuit. Useful if there is noise, water is not circulating, or radiators do not heat evenly. Compatible with Isomax C28 E, Isomax F28 E, Isotwin C24E (ref. 4516125). Includes a one-year warranty and delivery within 2–4 working days in the EU.

1
Consult via WhatsApp
Delivery in 2–4 working days
1-year warranty
14-day return
Technical support

Key Data

Reference
4516125
Brand
Wilo
Type of part
Pumps
Available units
1 unit in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. 4516125) equips these models. Verified compatibility; check the reference before purchasing.

Saunier Duval Isomax

  • Isomax C28 E
  • Isomax F28 E

Saunier Duval Isotwin

  • Isotwin C24E
  • Isotwin F24 E

Fault codes related to this part (not the entire boiler). They usually have more possible causes: first rule out electrodes, wiring/connections, and gas supply. Verified with ≥3 sources.

CodeWhat does it mean?Cause and diagnosis (this part)
11Pump blocked.The Wilo ZRS15/4-1 KU pump motor can seize or become blocked due to lime/dirt; if the water does not circulate, the electronics detect a blockage and display 11. Verify by powering the pump (230 V) at startup, checking consumption/ohmage and free rotation of the rotor (unblocking via front cap).
How do I know if this circulating pump is the one for my boiler?
Verify the reference 4516125 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part. It is a Wilo piece.
What is it used for?
The circulating pump circulates the water through the heating circuit.
Noise, water not circulating, or cold radiators?
Typical symptoms: humming, seized rotor after a long stop, or radiators that do not heat evenly.
Which models is it suitable for?
Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.
Installation and recommendations
Bleed the air from the circuit and the pump; check the pressure at 1–1.5 bar with the boiler cold.
What does refurbished mean and what coverage does it have?
Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

Spare Parts Related Boiler ZRS15 4 1 KU

Scroll to the top