PCB V-GROUP 0020027894 · PM-02 for Saunier Duval Isomax F35 H-MOD MOD.2

Main PCB or printed circuit board that manages the ignition, modulation, safety features, and communication of the boiler. It is located behind the front panel, in the control box.

Type of part: Saunier Duval
Status: Refurbished
internal SKU: PLC058
Warranty: 1 year

VAT included Stock · 3 units

Compatibility

Compatible Saunier Duval boilers

Saunier Duval. Two confirmed compatibilities: Saunier Duval Isotwin F 30 E H-MOD and Saunier Duval Isotwin F30 H-MOD. There are another 4 models that we are still verifying.

Proven compatibility

Boiler model	Family	Verification
Saunier Duval Isotwin F 30 E H-MOD	Saunier Duval	Contrasted
Saunier Duval Isotwin F30 H-MOD	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 Isotwin F30 H	Saunier Duval	Unconfirmed
Saunier Duval Master 3 30 SE	Saunier Duval	Unconfirmed
Saunier Duval Isotwin 30 kW	Saunier Duval	Unconfirmed
Saunier Duval Isomax F35 H-MOD MOD.2	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 the markings 0020027894, PM-02, and 2474 0059 G on the plate. The integrated circuit of our unit has 00200 27894 188.4.30.
Compare the Zettler relays (AZ6962-1CE-24D(200) and AZ849-1C-24D(200)) and the labeled connections 24 V, 230 Out, 230 Main, and 230 Rel.
Please note that different versions have been manufactured under the same reference: compare the number and position of relays and connectors.
Just to confirm: Do not confuse it with 20048284 (PCB for the F35 H-MOD) or with 0020212696 (Isomax Condens F 35).
If they match, call us at 911 17 77 77 with the model of your boiler.

Diagnosis and fault codes

Symptoms that require diagnosis in the Saunier Duval.

Common symptoms and faults

01
The boiler does not ignite or respond to any commands from the control panel.
Cause: It is recorded as the reason for changing the PCB 0020027894. Have a technician confirm it before changing it.
02
Erratic or continuous faults, unexpected restarts, stuck relays, burnt components, or oxidation in the circuit.
Cause: They cite them as signs of a damaged PCB.
03
The boiler does not ignite when starting and fault code F.28 appears.
Cause: Insufficient gas, condensate siphon blocked or failed ignition.
Have a technician check the gas, the siphon, and the electrode. Do not touch the gas valve.
04
The flame goes out during operation and the boiler tries to ignite several times.
Cause: Dirty ionization electrode, flue gas recirculation or gas cut-off.
Have a technician check the electrode, the flue gases, and the gas supply.
05
Fault codes F.00, F.01, F.10 or F.11 appear on the screen.
Cause: Loose sensor connector, interrupted wiring harness, or faulty NTC sensor.
Have a technician check the connectors first and then the sensor.
06
The boiler stops and displays F13 on the screen.
Cause: Internal fault of the main PCB.
Check the connections of the PCB, the product code, and perform a reset. If it reappears, have a technician check it.
07
F12 appears on the boiler screen.
Cause: Problem in the eBUS line.
Check the eBUS line. If the fault code persists, have a technician review it.

Fault codes Saunier Duval that require diagnosis

Code	Fault	Technical checks
F.28	Start-up fault: the burner does not ignite.	First of all, have a technician check the gas, the condensate siphon, and the electrode. Only point to the PCB if the gas is arriving properly and the ignition is still failing.
F.29	Flame loss during operation: the boiler ignites and then turns off.	Have a technician check the ionization electrode, the flue gases, and the gas supply. Only point to the PCB if the gas and the electrode are fine.
F.00	Interruption of the supply temperature sensor (inlet).	First, check the connectors of the sensor and the PCB, as the manual reviews the sensor before the PCB. If they are fine, the sensor may be faulty. Only check the PCB if the sensor and connectors are okay.
F.01	Interruption of the return temperature sensor.	First, check the connectors of the sensor and the PCB, as the manual reviews the sensor before the PCB. If they are fine, the sensor may be faulty. Only check the PCB if the sensor and connectors are okay.
F.10	Short circuit in the supply temperature sensor (inlet).	Have a technician check the sensor and the wiring harness. Only point to the PCB if the sensor and wiring are fine.
F.11	Short circuit in the return temperature sensor.	Have a technician check the sensor and the wiring harness. Only point to the PCB if the sensor and wiring are fine.
F13	Fault in the main PCB.	Check the connections of the PCB, the product code, and perform a reset. If the code appears again, it points to the main board and it should be checked by a technician.
F12	Voltage problem in the eBUS line.	Check the eBUS line. If the fault code persists, have a technician review 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

Saunier Duval

Uniclima internal SKU: PLC058
Brand: Saunier Duval
Type of part: Saunier Duval
Units in stock: 3 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.

Relay observed: ZETTLER AZ6962-1CE-24D(200)
Marked relay contacts: 8A 250VAC/30VDC
Marked connections: 24 V / 230 Out / 230 Main / 230 Rel
Inventory — Application indicated in inventory: SAUNIER DUVAL ISOMAX F35 H-MOD MOD.2
Weight data: 0.376 kg
Identification — Marked designation: PM-02
Identification — Marked code: 0020027894
Identification — Marked code: 2474 0059 G
Identification — Marked code: PM-02
Identification — Marked code: 00200 27894 188.4.30
Technical sheet: Observed relay: ZETTLER AZ6962-1CE-24D(200)
Technical sheet: Marked relay contacts: 8A 250VAC/30VDC
Technical sheet: Marked connections: 24 V / 230 Out / 230 Main / 230 Rel
Inventory data — Application indicated in inventory: SAUNIER DUVAL ISOMAX F35 H-MOD MOD.2
Pending applications to verify: Saunier Duval Isomax F35 H-MOD MOD.2 — compatibility cited; pending verification. Consultation 10/24/2026 · 1 supplier; pending confirmation: Isomax F 35 H-MOD; Isotwin F 30 H-MOD. Commercial statement for its technical sheet "PCB Saunier Duval (0020027894)", no certification of the unit. Confirm OEM reference, revision, configuration, and equipment variant before use: the manufacturer's breakdown Isotwin F30E H-MOD, p.12/34, identifies 0020027894 as the main board. The application of this reference is documented for that model; verify configuration 188.4.30 of the unit before extending it to other variants.

Before purchasing

To confirm: Symptoms attributed to this PCB in the Isotwin F30 H; they are not an official fault table for the Isomax F35 H-MOD.
To confirm: Saunier Duval Isotwin F30 H
To confirm: Saunier Duval Master 3 30 SE: (list of models)
Saunier Duval Isotwin 30 kW: (list of models)
Not compatible or excluded: Saunier Duval Isotwin Condens F 30 E — Main board S1040000; only the list with 0020027894.
Not compatible or excluded at source: Saunier Duval Isomax Condens F 35 (2010-2015) — main PCB 0020212696, replaced by 0020255376
Not compatible or excluded: Saunier Duval Isomax F 28 E — used Hungarian: panel 05724800
Do not confuse: 20048284 — PCB (= 0020048284) that is given for the Isomax F35 H-MOD — Another code: no sheet indicates the MOD.2 version. Compare your PCB code with both.
Do not confuse: 0020212696 — Main PCB of the Isomax Condens F 35 (2010-2015); replaced by 0020255376 — Another boiler (condensing) and another code: that table does not mention 0020027894.
To confirm: they connect the 0020027894 to the Isotwin F 30 E H-MOD and four others to the F30 H or F30 H-MOD. None connect it to the Isomax F35 H-MOD with the 0020027894, which is confirmed; for it, the 20048284.
Pending confirmation of registered applications by model, variant, or programming: Saunier Duval Isomax F35 H-MOD MOD.2.

Frequently Asked Questions

Frequently asked questions: Saunier Duval

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

To confirm: Our unit is marked with 0020027894, 2474 0059 G, and the designation PM-02; the integrated circuit has 00200 27894 188.4.30. It states that the reference is usually printed on the circuit or on a sticker on the side.

Is it compatible with my Saunier Duval Isomax F35 H-MOD MOD.2?

Check the status of each model in the compatibility sections; the pending variants are not validated. Registered application: this PCB for the Isomax F35 H-MOD MOD.2. Not confirmed: that boiler with the 0020027894: it is provided for the Isotwin. If your boiler is another version, send us a photo of the label of the PCB and the data plate from Contact.

In which other boilers has 0020027894 been seen?

Check the status of each model in the compatibility sections; the pending variants are not validated. To confirm: they provide it for the Isotwin F 30 E H-MOD; it requires "2007-2015", and for the Hungarian used ones, they provide it for the Isotwin F30 H-MOD, and for the F30 H. It is also listed for the Isotwin Condens F 30 E, but they provide the main board S1040000 for it.

Just to confirm: Is it the same PCB as the 20048284 for the Isomax F35 H-MOD?

there is no additional confirmation stating that. They provide 20048284 (= 0020048284) for the Isomax F35 H-MOD, without indicating the MOD.2 version, and none mention 0020027894 for that boiler. Registered confirmation: 0020027894 for the F35 H-MOD MOD.2: compare your PCB code with both.

What do 0020027894, PM-02, and 2474 0059 G mean?

0020027894 is the manufacturer reference from Saunier Duval that corresponds to the "main board"; its barcode is 3532040897410. PM-02 is the designation marked on the PCB and 2474 0059 G is another marked code. We have not found them without additional external confirmation, so we do not know what they indicate.

What symptoms point to this PCB?

To confirm: in its technical sheet for 0020027894, change it if the boiler does not ignite or does not respond to the panel, shows erratic or continuous faults, restarts, or has stuck relays, burns, or oxidation. It is the list of: a technician must confirm the fault.

Who should install it and what needs to be compared?

A qualified technician: the PCB controls a gas appliance and has labeled connections 230. It is requested to avoid short circuits and warns that there are different versions under the same reference: 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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PCB V-GROUP 0020027894 · PM-02 for Saunier Duval Isomax F35 H-MOD MOD.2