Saunier Duval Themafast F 25 E H-MOD Circulating Pump Ref. S1061800
Circulator pump of the boiler circuit. It drives the water to circulate for heating or domestic hot water; if it fails, the boiler does not heat properly or shuts off for safety. It is replaced when the motor does not start, makes noise, gets blocked, or leaks water from the shaft. According to the label: model HB15/6.7-2, two speeds (2500/2180 rpm), IP44, 230V-50Hz.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference S1061800
Circulating pump with reference S1061800. Four confirmed compatibilities: Themafast F 25 E H-MOD and Themafast F25E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Themafast F 25 E H-MOD | Themafast | Contrasted |
| Saunier Duval Themafast F25E | Themafast | Contrasted |
| Saunier Duval Themafast F 30 E H-MOD | Themafast | Contrasted |
| Saunier Duval Themafast F30E | Themafast | Contrasted |
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 ref. S1061800 is the part for your boiler
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference S1061800. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms and faults that the circulator pump S1061800 resolves.
The circulation pump circulates the water in the heating circuit. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler heats up slowly or takes a long time to reach the desired temperature.
Cause: The pump does not provide enough flow, so the heat is not distributed properly throughout the circuit.
If the speed selector is in the low position, try increasing it before replacing the pump.
- 02
Buzzing or rubbing noise when starting the pump
Cause: The rotor does not spin freely or there is trapped air in the pump body.
Bleed the air through the front screw and check if the noise decreases.
- 03
The pump does not start or gets stuck
Cause: The shaft may have seized due to sediment, especially if it has been inactive for several months.
Try to manually unlock the shaft through the rear slot before replacing it.
- 04
Water leak from the pump shaft or body
Cause: The mechanical seal has lost its tightness.
Make sure that it is not a flange joint that is leaking, as that does not require changing the pump.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.23 | Safety shutdown due to excessive temperature difference (very reduced circulation). | If the circulating pump (S1061800) is blocked or not rotating, the flow rate drops: the supply heats up quickly and the return remains cold, triggering F.23. Check the voltage to the pump, consumption/start-up, and actual flow rate (bleeding or test program if applicable). |
| F.24 | Safety shutdown due to excessively rapid temperature increase (lack of circulation). | A faulty heating pump or one without flow causes a large rise gradient in the supply and triggers F.24. Check that the pump receives 230 V, starts, and that the system is correctly bled. |
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.
Data sheet for the Saunier Duval S1061800 circulation pump.
- Catalogue reference
- S1061800
- Brand
- Saunier Duval
- Type of part
- Pumps
- Units in stock
- 4 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- Model
- HB15/6.7-2
- Degree of protection
- IP44
- Speeds
- 2500 / 2180 rpm
- Current
- 0.38 / 0.29 A
- Power
- 85 / 64 W
- Condenser
- 2.6 uF - 400VDB
- Voltage and frequency
- ~230V - 50Hz
- Insulation class
- F - TF95
- Manufacturing date
- week 41/2004 (41/04)
- Printed codes
- 4514062 / 4514293
Frequently asked questions about the S1061800 circulation pump
What pump model does the Themafast F 25 E H-MOD use?
What boiler models are compatible with the Saunier Duval Themafast F 25 E H-MOD Ref. S1061800 circulator pump?
In what situations is the pump of the Themafast F 25 E H-MOD replaced?
What is the power consumption of the pump in the Themafast F 25 E H-MOD at each speed?
What fault codes are documented for this pump?
What is the reference for the circulation pump for the Themafast F 25 E H-MOD?
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