Grundfos Circulating Pump Hermann Renova Micra 2 24E Ref. 149100103
RefurbishedRenovaPumps

Grundfos Circulating Pump Hermann Renova Micra 2 24E Ref. 149100103

65 €VAT includedIn stock · 5 units

Circulating pump: refurbished spare part that circulates the water in the heating circuit. Useful if there is noise, the water does not circulate, or the radiators do not heat evenly. Compatible with 23 SE, 24 SE, 23 E (ref. 149100103). 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
149100103
Brand
Renova
Type of part
Pumps
Available units
5 units in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. 149100103) equips these models. Verified compatibility; check the reference before purchasing.

Micra

  • 23 SE
  • 24 SE

Micra 2

  • 23 E
  • 24 SE

Habitat 2

  • 23 E
  • 24 SE

Habitat Plus

  • 23 SE

Supermicra

  • 23 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)
F.23Safety shutdown: temperature variation too large (NTC1/NTC2).A blocked or reduced power circulating pump prevents flow, and the flow temperature rises significantly compared to the return. Check the pump's voltage and consumption, unblock the rotor, and check the flow/return ΔT after bleeding.
F.24Safety shutdown: temperature increase too rapid.If the pump is seized or weakened, the flow rate drops and the primary overheats very quickly. Check the power supply and rotation of the pump, actual flow rate, and perform a complete bleed of the circuit.
F.89Error: pump.The electronics detect the pump as not/poorly connected or short-circuited. Check the pump connector and wiring, motor continuity/insulation, and ensure it receives 230 V when the PCB commands operation.
How do I know if this pump is for my boiler?
Verify reference 149100103 and ensure your model is on the list of compatible ones; compare connections and measurements. Install a Grundfos UPS 15-50 CS 87 pump.
Which models is it suitable for?
Pump shared by various models (see Compatibility). If your model does not appear, send us a photo and we will confirm it.
My boiler is making noise or the water isn't circulating, is it the pump?
Typical symptoms: noise or humming, seized rotor after a long stop, radiators not heating evenly, or shutdowns due to overheating. Check that the rotor turns and that the circuit bleeds properly.
Do you need to bleed it after changing it?
Yes. After installation, bleed the air from the circuit and the pump itself, and check the pressure at 1–1.5 bar with the boiler cold.
What pump does it exactly have?
Install a Grundfos UPS 15-50 CS 87 pump. Compare the body, connections, and connector with the original before installing.
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.

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