Saunier Duval Themafast C 28 E Heating Circulating Pump Ref. S1005500
RefurbishedSaunier DuvalPumps

Saunier Duval Themafast C 28 E Heating Circulating Pump Ref. S1005500

80 €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 ThemaClassic F AS 30 A (ref. S1005500). 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
S1005500
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. S1005500) equips these models. Verified compatibility; check the reference before purchasing.

ThemaClassic

  • ThemaClassic F AS 30 A

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: excessive temperature variation.The circulator pump (S1005500) blocked or with reduced power does not move flow and the ΔT supply/return spikes; check by forcing the pump to run, confirming vibration/consumption, and that the ΔT decreases after bleeding.
F.24Safety shutdown: temperature increase too rapid.If the pump is seized or not delivering flow, the primary heats up very quickly; check by forcing the pump to start, measuring ΔT, and confirming power supply and pump rotation.
F.75Pump error, lack of water.Upon startup, the electronics await a pressure pulse generated by the pump; if the pump (S1005500) does not start or is faulty, this increase is not detected and F.75 is triggered. Check the supply voltage and ensure that the pressure momentarily rises at the beginning.
How do I know if this circulating pump is the one for my boiler?
Verify the reference S1005500 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.
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.

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