Main PCB Saunier Duval Isofast F 35 E H MOD Ref. S1047000

Check the model and version before ordering

We retain associated models to help you find your appliance. The version and parts diagram must be checked before choosing this replacement.

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.

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. S1047000 is the part for your boiler

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

1. Find the reference printed on the installed part and check whether it matches the catalogue reference S1047000. If it is not visible, do not identify the part from its shape alone.
2. Check the full boiler model on its data plate and look for it in the model associations on this page.
3. Compare the connections and physical body with the original part before installation.
4. If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.

Symptoms that require diagnosis on the PCB S1047000

The PCB controls the ignition, modulation, and safety features of the boiler. These are the typical symptoms and what to do:

Common symptoms and faults

• 01

  The boiler is completely dead: neither the display nor any indicator lights up.

  Cause: The integrated power supply on the PCB may have failed, which distributes current to the rest of the circuits.

  Check with a multimeter that mains power is reaching the PCB and that the fuse is not blown before replacing it.

• 02

  A communication or bus fault code appears, and the control does not display data from the boiler.

  Cause: The communication circuit of the PCB with the remote control or accessories has been damaged.

  Check the wiring of the bus between the PCB and the control, and test with the boiler in local mode before replacing the PCB.

• 03

  The water heating or heating system activates inconsistently, as if the boiler is deciding on its own.

  Cause: A relay on the PCB may have stuck, keeping a circuit that should be cut active.

  Listen for the click of the relays when switching and measure if there is current in the component when it should be stopped.

• 04

  The boiler loses its configuration or programmed parameters after each power outage.

  Cause: The memory of the PCB, or the battery that supports it, may be failing and not retaining the saved data.

  Check if the boiler has a backup battery on the PCB and its condition before replacing the entire assembly.

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 S1047000 PCB.

Catalogue reference

S1047000

Uniclima internal SKU

PECSDIF35EHMOD

Brand

Saunier Duval

Type of part

PCBs (control boards)

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.

PCB code (silkscreened)

SYMSI7.0 / 0310144400S19

Sales reference printed on the plate

S1047000

Relays

OMRON G5Q-1 DC24V, batch 26Y5C4

Plastic certification

UL GF201 94V-0 / GF P/N 2036288A 2

Manuals and technical documentation

Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.

• Saunier Duval F 35 E H-MOD Manual (PDF) Document © Saunier Duval, provided as a technical reference.