
Wilo Circulating Pump HB15/7-3 For Saunier Duval Isofast F 30 E H-MOD - Ref. S1024100
Wilo circulator pump model HB15/7-3 that moves the water of the heating/DOMESTIC HOT WATER circuit of the boiler. It operates at three selectable speeds (2000, 2360, and 2600 min-1). The change requires first confirming the fault of the part through technical diagnosis, even when it does not start, makes noise, leaks, or the boiler does not heat despite the burner functioning normally.
- Type of part
- Pumps
- Status
- Refurbished
- Catalogue reference
- S1024100
- Warranty
- 1 year
Saunier Duval boilers compatible with reference S1024100
Circulating pump with reference S1024100. A proven compatibility: Isofast F 30 E H-MOD.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Isofast F 30 E H-MOD | Isofast | 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. S1024100 is the part for your boiler
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Find the reference printed on the installed part and check whether it matches the catalogue reference S1024100. 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 that require diagnosis in the circulator pump S1024100
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 burner ignites and operates normally, but the heating does not warm up.
Cause: If this pump does not circulate water, the heat generated will not reach the radiators even if the combustion is correct.
Touch the pump body with the boiler running: if you don't feel any vibration or heat, it's not spinning.
- 02
The pump vibrates or makes a noise different from the normal operating hum.
Cause: With three selectable speeds, an imbalance in the impeller due to air or lime is more noticeable as vibration at higher speeds.
Bleed the air from the circuit and test the three positions of the selector before considering the pump as faulty.
- 03
Water is leaking from the pump body, near where it connects to the motor.
Cause: The shaft seal wears out over the years and starts to let water through gradually.
Dry the area and check after a heating cycle if the moisture reappears right there.
- 04
The pump is completely blocked, it doesn't turn even though it receives power.
Cause: The shaft seizes if the pump has been idle for a long time, something common after the summer.
Locate the bleed screw in the center of the motor and turn it with a flathead screwdriver to try to free the shaft.
Fault codes Saunier Duval that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 11 | Pump (circulator) lockout. | The pump motor is blocked or not rotating, so there is no circulation and the boiler displays 11; check by removing the rotor cap to turn/unblock it and verify 230 V supply at the pump terminals. |
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 S1024100 circulation pump.
- Catalogue reference
- S1024100
- Uniclima internal SKU
- BCCIF30EHMOD
- Brand
- Saunier Duval
- Type of part
- Pumps
- Units in stock
- 5 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- Manufacturer
- Wilo
- Model
- HB15/7-3
- Part reference
- 4515543
- Capacitor / insulation voltage
- 3.5µF - 400VDB
- Voltage/frequency
- ~230V-50Hz
- Thermal class
- Class F - TF95
- Degree of protection
- IP44 (PN3)
- Speeds (rpm / A / W)
- III: 2600 min-1, 0.52A, 118W | II: 2360 min-1, 0.40A, 86W | I: 2000 min-1, 0.27A, 58W
- Place of manufacture
- Made in EU








