Saunier Duval Isomax C 28 E2 DHW Circulating Pump Ref. 05738300
RefurbishedSaunier DuvalPumps

Saunier Duval Isomax C 28 E2 DHW Circulating Pump Ref. 05738300

60 €VAT includedIn stock · 5 units

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 C 28 E, Isomax F 28 E, Isomax C 28 E2 (ref. 05738300). 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
05738300
Brand
Saunier Duval
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. 05738300) equips these models. Verified compatibility; check the reference before purchasing.

Isomax

  • Isomax C 28 E
  • Isomax F 28 E
  • Isomax C 28 E2

Isotwin

  • Isotwin C 24 E
  • Isotwin F 24 E
  • Isotwin F 28 E2

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.If the sanitary pump 05738300 seizes or fails electrically during the DHW recharge, the electronics detect circulator blockage and trigger "11". Verification: force DHW demand, check 230 V and current in the pump, and release/inspect the shaft from the front cap.
How do I know if this circulating pump is the one for my boiler?
Verify the reference 05738300 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 Isomax C 28 E2

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