Saunier Duval SYMSI7.0 PCB · 0310144400L12 for Themafast C25E and Themaclassic C25E

Price pending confirmation; please consult us before booking. The control board manages ignition, modulation, safety features, and communication. It is located behind the front panel, in the control box.

Type of part: Saunier Duval
Status: Refurbished
internal SKU: PLC053
Warranty: 1 year

VAT included OUT OF STOCK

Compatibility

Compatible Saunier Duval boilers

Saunier Duval. Five confirmed compatibilities: Isofast F30 EA and Themafast C25E. There are another 5 models that we are still verifying.

Proven compatibility

Boiler model	Family	Verification
Saunier Duval Isofast F30 EA	Saunier Duval	Contrasted
Saunier Duval Themafast C25E	Saunier Duval	Contrasted
Saunier Duval Themafast F25E H-MOD (or F25 E H-MOD)	Saunier Duval	Contrasted
Saunier Duval Themaclassic C25E	Saunier Duval	Contrasted
Saunier Duval Themaclassic F25E	Saunier Duval	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.

Saunier Duval Themafast C30E, F25E, F30E and F30E H-MOD	Saunier Duval	Unconfirmed
Saunier Duval Isofast F30 E H-MOD and F35 E H-MOD	Saunier Duval	Unconfirmed
Saunier Duval Themafast F24E; Thematek SC24E; Themaclassic C24E, CAS 24E, CAS 25E, F24E, FAS 24E, and FAS 30E; Isotwin F24E	Saunier Duval	Unconfirmed
Saunier Duval Isotwin C24EA, C28EA, C24E AD04, C24E DE04, F24EA and F28EA; Thema F25E STL; Themaclassic FAS 25E; Themafast C24E, C28E and F30E 2004; Thematek C24E, C24EO BT, F24E and SF24E	Saunier Duval	Unconfirmed
Saunier Duval Thema C 25 E; Themaplus C 24 E, C 25 EV, C 30 E, F 25 E and F 30 E	Saunier Duval	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 it is the part for your boiler

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

Look for 0310144400L12 and SYMSI7.0 on the circuit or on a side sticker; the circuit also has SUNG WEI 06V0-A.
Compare the complete code, not just the base 0310144400: the SYMSI7.0 also exists as 0310144400S19, R18 or 015, which are other codes.
Check if your boiler is one of the confirmed models; those listed as pending verification are not confirmed yet. According to an Italian spare parts dealer, the Isofast, Isomax, and Isotwin Condens models of 30 and 35 kW would have a different PCB (0310144400S19); this is not confirmed.
If they match, call us at 911 17 77 77 with your boiler model or send a photo of your spare part from Contact.

Diagnosis and fault codes

Symptoms that require diagnosis in the Saunier Duval.

Common symptoms and faults

01
Does not turn on or does not respond to the thermostat.
Cause: check first that voltage is reaching the input.
02
Erratic errors on the display or spontaneous restarts
Cause: check for stuck relays, burnt traces or oxidation.

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

Saunier Duval

Uniclima internal SKU: PLC053
Brand: Saunier Duval
Type of part: Saunier Duval
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.

Inventory — Visible terminals/screen prints: Z1G, H2, H5, P1, P2, H9, UA, EXT, V3V, J3Z1
Inventory — Omron Relay: 24 VDC coil; contact 10 A 250 VAC
Inventory — Relay subcomponent: Omron G5Q-1A
Inventory — Subcomponent condenser C803: 10 nF, 400 V
Inventory — Application indicated in inventory: SAUNIER DUVAL THEMACLASSIC F25 E
Identification — Marked designation: SYMSI7.0
Identification — Marked code: 0310144400L12
Identification — Marked code: SUNG WEI06V0-A
Inventory data — Visible terminals/screen prints: Z1G, H2, H5, P1, P2, H9, UA, EXT, V3V, J3Z1
Inventory data — Omron relay: 24 VDC coil; contact 10 A 250 VAC
Inventory data — Relay subcomponent: Omron G5Q-1A
Inventory data — Subcomponent condenser C803: 10 nF, 400 V
Inventory data — Application indicated in inventory: SAUNIER DUVAL THEMACLASSIC F25 E

Before purchasing

To confirm: Themafast C30E, F25E, F30E, and F30E H-MOD — There are associations with marking L12 and others only with S1047000, without L12. The correspondence of this variant with each model is still to be confirmed.
To confirm: Isofast F30 E H-MOD and F35 E H-MOD — Associations appear with marking L12 and others only with S1047000, without L12. The exact variant must be confirmed.
To confirm: Themafast F24E; Thematek SC24E; Themaclassic C24E, CAS 24E, CAS 25E, F24E, FAS 24E and FAS 30E; Isotwin F24E — Documented by, to be verified. With L12, only (Themafast F24E) and (Thematek SC24E). The others, only by S1047000, without L12.
To confirm: Isotwin C24EA, C28EA, C24E AD04, C24E DE04, F24EA and F28EA; Thema F25E STL; Themaclassic FAS 25E; Themafast C24E, C28E and F30E 2004; Thematek C24E, C24EO BT, F24E and SF24E — The associations cite S1047000 and do not credit L12 for each model. For Themafast F30E 2004, L12 also appears; SF24E remains unconfirmed.
To confirm: Thema C 25 E; Themaplus C 24 E, C 25 EV, C 30 E, F 25 E and F 30 E — The association cites S1047000, without confirming the marking L12.
Not compatible or excluded by default: Isofast Condens F30 E and F35 E, Isomax Condens F35 E, Isotwin Condens F30 E — They use a different SYMSI7.0: 0310144400S19 (spare part S1040000). The manufacturer's catalog lists "S10400 Printed circuit board" for the Isofast Condens F 35 E.
Do not confuse: 0310144400S19 — SYMSI7.0 from the Isofast, Isomax, and Isotwin Condens of 30 and 35 kW (spare part S1040000) — Another suffix and other boilers.
Do not confuse: 0310144400R18 — SYMSI7.0 which French provides for the Thema C24 E V (SUNG WEI 06V0-A) — Another suffix: compare the complete code.
Do not confuse: 0310144400015 — SYMSI7.0 sold separately for Themafast F — Another suffix: compare before considering it equivalent.
Not confirmed: S1047000 as the manufacturer's reference alongside L12; it only shows it as SKU of its.
and they join the 0310144400L12 with a Saunier Duval PCB. Without an official breakdown that mentions it.

Frequently Asked Questions

Frequently asked questions: Saunier Duval

Where is the code for this PCB and what other markings should I compare?

The 0310144400L12 and the designation SYMSI7.0 are marked on the circuit or on a side sticker, next to the SUNG WEI 06V0-A. Compare the three, not just the base 0310144400.

Is it compatible with my Themaclassic C25E or F25E, Themafast C25E or F25E H-MOD, or Isofast F30 EA?

Yes. Confirmed: for those five boilers. Provide the L12 for the Themafast C25 E, for the F 25 E H-MOD, and list the S1047000 as the "carte principale" of the Themaclassic F 25 E.

Is it compatible with my Isofast F30 E H-MOD, Themafast F30E, Isotwin or Thematek?

document them, but they need to be contrasted with the variant. Provide the L12 for the Isofast F30 and F35 E H-MOD; for several Themafast. Send us a photo of the PCB and the label of your boiler, or call 911 17 77 77.

What is the difference between the 0310144400S19, the R18, or the 015?

To confirm: They share the base and name SYMSI7.0, but the suffix changes. The S19 (spare part S1040000) is for the Isofast, Isomax, and Isotwin Condens of 30 and 35 kW; the French one gives the R18 for the Thema C24 E V; it sells the 015 separately for Themafast F.

What is the S1047000 that appears in spare part references?

It is the Saunier Duval code that corresponds to the SYMSI7.0. Registered designation: "carte principale" of the Themaclassic F 25 E and note that it replaces 1008200. Without additional confirmation, it is given as the manufacturer's reference along with L12; it is used only as its SKU.

Should I install it myself or does something need to be adjusted?

A qualified technician is recommended: it operates at 230 V. It indicates that sometimes it is necessary to adjust the parameters of the model with the selectors and compare relays and connectors.

How to identify this PCB?

Compare the silkscreen, the distribution of the connectors, and the exact variant of the circuit with the photographs.

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Saunier Duval SYMSI7.0 PCB · 0310144400L12 for Themafast C25E and Themaclassic C25E