Grundfos UP 15-40/SD pump Saunier Duval – Ref. 59714528

Pump that moves the water from the heating circuit to the radiators, with a registered application for four Saunier Duval boilers from the compatibility list. Its correspondence with reference 05720700 is pending confirmation.

Type of part: Pumps
Status: Refurbished
Catalogue reference: 59714528
Warranty: 1 year

VAT included OUT OF STOCK

Compatibility

Grundfos boilers compatible with reference 59714528

Circulating pump with reference 59714528. Four confirmed compatibilities: Saunier Duval Thema F 23 E and Saunier Duval Thelia 23 E. There are another 5 models that we are still verifying.

Proven compatibility

Boiler model	Family	Verification
Grundfos Saunier Duval Thema F 23 E	Grundfos	Contrasted
Grundfos Saunier Duval Thelia 23 E	Grundfos	Contrasted
Grundfos Saunier Duval Isofast F 28 E1	Grundfos	Contrasted
Grundfos Saunier Duval Combitek C 23	Grundfos	Contrasted

Models pending verification

These models are associated with this reference, but we have not finished verifying them yet, so we do not consider them compatibleIf your boiler is one of them, send us a photo of the part you are going to replace and we will verify it before you purchase.

Grundfos Isomax C 28 E, C 28 E2, F 28 E and F 28 E2	Grundfos	Unconfirmed
Grundfos Isofast F 28 E and C 28 E1	Grundfos	Unconfirmed
Grundfos Isofast C 28 E · Isomax C 28 E2 04 and F 28 E2 04 · Isotwin C 24 EA, C 24 Ean, C 24 Ede, F 24 E and F 24 EA	Grundfos	Unconfirmed
Grundfos Isofast C 24 EV and EV1	Grundfos	Unconfirmed
Grundfos Glowworm Xtrafast and Xtramax · Saunier Duval Xtrafast 96 Combi NG	Grundfos	Unconfirmed

Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.

Guide

How to check if reference 59714528 is the part for your boiler

The part reference, model, and equipment revision must be verified against the manufacturer's documentation.

Look at the motor label: it should say Grundfos UP 15-40/SD and P/N 59714528.
Compare the data: 95 W, 0.41 A, and a 2 µF capacitor. If the label shows a different model or different data, it is another pump.
Note the exact model of your boiler's PCB and compare it with those confirmed for this pump.
If your boiler is a different model, send us a photo of the pump label and the boiler's PCB from the Contact section, and we will confirm if it is your spare part before you purchase.

Diagnosis and fault codes

Symptoms that require diagnosis in the circulation pump 59714528

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 radiators do not heat up even though the boiler turns on.
Cause: With the heating on, check if the pump vibrates and heats up. Inspect the circuit valves.
02
Stuck rotor after the summer due to prolonged lack of use.
Cause: Have a technician check if the shaft rotates freely.
03
Noise, buzzing, or vibration when starting the heating.
Cause: Have a technician check it before replacing the pump.
04
Visible water leaks on the body of the pump.
Cause: Dry the area and check if water comes out again from the shaft or from a nearby fitting.
05
Lockout due to lack of circulation in the system.
Cause: Check that the pump is receiving power and that the valves are open.
06
The boiler stops with fault code F.23 or F.24 when the temperature rises too quickly.
Cause: Blocked pump or low power, or air in the circuit.
Bleed the system and have a technician check the circulation pump.
07
The boiler stops with fault code F.22: there is not enough water in the circuit.
Cause: Low water in the circuit or faulty water pressure sensor.
Fill the water circuit. If it happens again, have a technician check the pressure sensor.
08
The boiler stops with fault code 05: overheating.
Cause: Possible air in the system, faulty pump or obstruction.
Have a technician check it. If the water is not circulating, the pump is suspect.
09
The boiler stops with fault code 21: lack of water in the system.
Cause: Pressure below 0.5 bar: lack of water or leak.
Fill with the blue key until about 1-1.2 bar. If it drops again, have a technician check it.
10
The boiler stops with fault code F22: lack of water in the system.
Cause: Low water in the circuit, either a faulty pressure sensor or a damaged pump cable.
Add treated water until it reaches the pressure indicated by the manometer. If it happens again, have it checked by the technical service.
11
The boiler stops when the water does not circulate properly: the return is very hot or the temperature rises too quickly (fault codes F23 or F24).
Cause: Blocked pump or low power, or air in the circuit.
Have a technician check the pump and bleed the circuit.
12
The boiler stops with a warning of low water or low pressure, and the pressure drops again after refilling.
Cause: Low water in the circuit, faulty pressure sensor, or loose wire from the pump or sensor.
Check the cold pressure and the cables. If the pressure drops again, have a technician look for leaks.
13
The boiler stops due to overheating, with the warning F.20 (or F5 depending on the range). The water does not circulate well.
Cause: Lack of circulation: blocked pump, air in the circuit, or obstructed heat exchanger.
Do not reset it over and over again. Have a technician check it.
14
The boiler displays the warning F.22: low water pressure and the heating is blocked.
Cause: Low water pressure in the circuit, due to a leak or lack of water.
Check the manometer: the normal pressure when cold is 1-1.5 bar. If the pressure drops again, have a technician check it.
15
It stops and shows F23.
Cause: Poor circulation: the pump does not move the water properly. Common causes: weak or jammed pump, air or dirt in the circuit.
Bleed the radiators and check the pressure. If the pump is noisy, works intermittently, or is stuck, have a technician check it.
16
Stops and shows F24: the return exceeds 90 °C.
Cause: Overheating of the heating return. It may be due to a fault in the pump or a blocked heat exchanger.
Allow the boiler to cool down. Do not restart repeatedly; have a technician check it.
17
F73 appears on the screen.
Cause: The PCB does not detect that the pump starts.
Check the pressure and air in the circuit. If the pump does not start or is stuck, have a technician check it.

Grundfos fault codes that require diagnosis

Code	Fault	Technical checks
05	Overheating safety: the bimetallic thermostat of the boiler has tripped, which has a manual reset.	If it repeats, check that there is water in the system and that the pump is circulating. If it is not circulating, point to the pump. Have a technician check it.
F.22	Stopped due to lack of water in the circuit or due to incorrect reading from the water pressure sensor.	Code with a dot, typical of the Isofast Condens; the old Isofast models use numbers. With the boiler cold, check the pressure gauge: if the pressure is low, refill; if not, the sensor or the cable to the pump are suspect.
F.23	Safety shutdown due to excessive temperature variation: the pump may be blocked or underpowered, or there is air in the circuit.	Code with a dot, typical of the Isofast Condens. If the boiler stops again while heating, it points to the pump: have a technician check it.
F.24	Safety shutdown due to too rapid temperature rise: pump blocked or with low power, or air in the circuit.	Code with a dot, typical of the Isofast Condens. Just like the F.23: if it repeats, have a technician check the pump and the air in the circuit.
F20	Stopped due to overheating (temperature limiter).	If it repeats, have a technician check it: the blocked pump or air in the circuit may be behind it.
F.75	Pressure switch fault: defective sensor or pump, or lack of water.	Check the pressure and refill if it's low. If it returns with the pressure okay, have a technician check it. Point to the pump or the pressure sensor.
F09	Fault of the heating circuit pressure sensor.	Check the circuit pressure on the manometer. If the pressure is correct and the fault persists, have a technician check it.
F26	The maximum temperature difference between supply and return is too high.	It usually indicates low water circulation. Check the pump and the air in the circuit; have a technician review it.
F73	The PCB does not detect that the pump is operating.	It does not appear in the official table of the Xtramax HE. Confirm the code on the screen. If the pump does not start or is stuck, have a technician check it.
F9	Fault of the water pressure sensor. Another guide also attributes it to a blocked filter or to the pump.	Check the circuit pressure (between 1 and 1.5 bar). If it is correct and the fault code persists, have a technician check it.

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.

Technical data

Technical sheet: Grundfos 59714528

Catalogue reference: 59714528
Uniclima internal SKU: BOM035
Brand: Grundfos
Type of part: Pumps
Units in stock: 0 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.

Power supply: 230 V, 50 Hz
Marked capacitor: 2 uF
Current / power: 0.41 A / 95 W
Protection: IP44
Set temperature: TF95
Marked class: H
Maximum pressure marked: 6 bar
Inventory — Type of spare part: Pumps
Inventory — Condenser: 2 μF
Inventory — Application indicated in inventory: THEMA F 23 E THELIA 23 E ISOFAST F 28 E1 COMBITEK C 23
Inventory — Marked code: 0022
Verified data — Pump: Grundfos UP 15-40/SD
Verified data — Power: 95 W · 0.41 A
Verified data — Power supply: 230 V · 50 Hz
Verified data — Condenser: 2 µF
Verified data — Protection: IP44 · insulation class H
Verified data — Water temperature: Up to 95 °C (TF95)
Verified data — Maximum pressure: 6 bar
Verified data — Other marked: 0022 · 115 895B · BS1394
Identification — Marked designation: UP15-40/SD
Identification — Marked code: 59714528
Technical sheet: Power supply: 230 V, 50 Hz
Technical sheet: Marked capacitor: 2 uF
Technical sheet: Current / power: 0.41 A / 95 W
Technical sheet: Protection: IP44
Technical sheet: Marked temperature: TF95
Technical sheet: Marked class: H
Technical sheet: Maximum marked pressure: 6 bar
Inventory data — Type of spare part: Pumps
Inventory data — Condenser: 2 μF
Inventory data — Application indicated in inventory: THEMA F 23 E
Inventory data — Application indicated in inventory: THELIA 23 E
Inventory data — Application indicated in inventory: ISOFAST F 28 E1
Inventory data — Application indicated in inventory: COMBITEK C 23
Inventory data — Marked code: 0022
Pending applications to verify: • Isofast C 28 E. • Isomax C 28 E2 04 and F 28 E2 04: 2; the official list only mentions E2. • Isotwin C 24 Ean, C 24 Ede and F 24 EA: 2. • Isotwin C 24 EV (2001-2004 and 2004-2006) and C 24 EV A, Isofast C 24 E V and E V1: 1. • CONFLICT Isomax C/F 28 E205 and Isotwin C/F 28 EA: it gives them 05732500 (part #12). Uniclima lists them in its sheet for 59714528 without confirmation. • NOT for Isofast C 35 E, C 35 E1, F 35 E and F 35 E1: they use 05732500, UP 15-60/SD (official breakdown of F 35 E and E1 in #12). Uniclima attributes them to 59714528 without confirmation. • NOT for Thema F 23 E, Thelia 23 E and Combitek C 23 (noted by the warehouse): for this pump, it gives 05123600 (another UP 15-40/SD, 23 kW) to Combitek C 23, Thema F 23 and Thelia 23 CE / AS 23, only in extract. Documented applications of another reference; link with this unit pending: Verified for 05720700 (its connection with 59714528 has not yet arrived). SAUNIER DUVAL (official list Isomax +) • Isomax C 28 E • Isomax C 28 E2 • Isomax F 28 E • Isomax F 28 E2 SAUNIER DUVAL • Isofast F 28 E1 (it gives it for 59714528) • Isofast C 28 E1 • Isofast F 28 E • Isotwin C 24 EA • Isotwin F 24 E
Registered equivalents and substitutions: Saunier Duval 05720700 = Grundfos UP 15-40/SD. Registered designation: the label 59714528, although it clarifies that it does not establish automatic equivalence. Replacement: 0010030635, high-efficiency pump (correspondence table and "Remplacé par 0010030635"). It is another pump: it comes with a plug or PWM connector and requires a harness. It says "Voir 0010034152," but the table lists that pump for S1005200 and S1005500. DO NOT CONFUSE • 05732500 = Grundfos UP 15-60/SD from the Isofast F 35 E and F 35 E1: it is part #12 (its label: P/N 59716503, 110 W, 0.45 A, 2.5 µF). • 05123600 = another UP 15-40/SD, for boilers of 23 kW (Thema, Thelia, Combitek). • 0020037112: it is given as the manufacturer code for the 05720700; the table and registered designation: another pump (Semia C/F/V 24).

Before purchasing

The fault diagram in the official manual for the Thema F 23 E indicates for the pump "Free pump" (release it) and "Replace pump motor"; the PDF does not allow reading the exact symptom.
The five symptoms are the signals listed for the UP 15-40/SD pump (05720700).
To confirm: Isomax C 28 E, C 28 E2, F 28 E and F 28 E2 — 05720700 in y (all four), (C 28 E and F 28 E2) and (F 28 E and F 28 E2); it needs to be linked to this label.
To confirm: Isofast F 28 E and C 28 E1 — 05720700 in e; the F 28 E, also in; needs to be linked to this label.
To confirm: Isofast C 28 E · Isomax C 28 E2 04 and F 28 E2 04 · Isotwin C 24 EA, C 24 Ean, C 24 Ede, F 24 E and F 24 EA — for 05720700
To confirm: Isofast C 24 EV and EV1 — for 05720700
To confirm: Glowworm Xtrafast and Xtramax · Saunier Duval Xtrafast 96 Combi NG — each: (quote P/N 59714528)
Not compatible or excluded: Thelia 23 CE — 05123600; without additional confirmation, it is linked with this label. The Thelia 23 E is confirmed with this pump.
Do not confuse: 05123600 — Pump for Thema, Thelia, and Combitek boilers — without additional confirmation it is linked to P/N 59714528; one of those lists 51236 (Thelia 23 CE), the same code that the official manual gives for the pump of the Thema F 23 E. Send the confirmed information.
Do not confuse: 0010030635 — High efficiency pump that replaces 05720700, according to unconfirmed information (correspondence table) — Another pump: has a plug or PWM connector and requires a harness.
Confirmation registered: this pump for four Saunier Duval boilers: 2 link the label with 05720700 (the 3rd is missing); the other boilers are still to be confirmed.

Frequently Asked Questions

Frequently asked questions: 59714528 circulator pump

Is it suitable for my boiler?

Yes, if it is a Saunier Duval Thema F 23 E, Thelia 23 E, Isofast F 28 E1 or Combitek C 23: Confirmation registered: this pump is for those boilers. the 05123600 for Thema, Thelia and Combitek boilers, but send the confirmed one. If your boiler is another model, send us a photo of its plate and the pump label from Contact, or call 911 17 77 77.

What is the official code in the spare parts list for the Thema F 23 E?

The official manual of the Thema F 23 E lists the pump with the code 51236 ("2 Pump 51236"). It does not mention Grundfos or the P/N 59714528: that this Grundfos is that pump is confirmed.

Is the 05720700 from Saunier Duval?

There is: a British company sells the "Pump 59714528 05720700 Was 57207" and lists the 05720700 as UP 15-40/SD, without mentioning the P/N, in its "Isofast F28 E1" sheet (confirmed). A spare parts list from the company attributes the 5720700 to Wilo; it has it as Grundfos. A third source is needed to verify it.

Why does a spare parts list mention a 30 W pump?

The spare parts list for the Isomax refers to 05720700 as "Pump 30 W," but the label on this pump indicates 95 W. Another one also states 30 W for code 57207. We are not sure if it's just the name of the part: check your pump before purchasing.

Is it compatible with the Isofast C/F 35 E?

it is not confirmed for those boilers and without additional confirmation, we have linked them with this label. This is a UP 15-40/SD of 95 W and 2 µF: if the pump of your boiler shows a different model, it is another pump.

Which pump replaces 05720700?

According to an unconfirmed correspondence table and the technical sheet, the 0010030635 is a high-efficiency pump. It has a plug or PWM connector and requires a harness. The British source lists it as discontinued, "with no known substitute." Consult your technician before replacing it.

What reference and model appear on the PCB?

Saunier Duval/Grundfos UP 15-40/SD, P/N 59714528.

What power supply and power does it indicate?

230 V at 50 Hz, 2 µF capacitor, 0.41 A and 95 W; IP44, TF95, class H and maximum 6 bar.

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Grundfos UP 15-40/SD pump Saunier Duval – Ref. 59714528