V-GROUP PM-01 PCB · 0020023308 / 0020028479 · Saunier Duval Isomax F35 E Isotwin F30

Control PCB of the boiler, corresponding to reference 0020028479 pending confirmation. If the boiler does not ignite, shows erratic errors, or restarts by itself, first check the power supply and the fuses.

Type of part: Saunier Duval
Status: Refurbished
internal SKU: PLC059
Warranty: 1 year

VAT included Stock · 6 units

Compatibility

Compatible Saunier Duval boilers

Saunier Duval. A proven compatibility: Saunier Duval Isotwin F30 H-MOD. There are 3 other models that we are still verifying.

Proven compatibility

Boiler model	Family	Verification
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 F25 EH-MOD	Saunier Duval	Unconfirmed
Saunier Duval Isofast E 35 H MOD	Saunier Duval	Unconfirmed
Saunier Duval Isomax F35 HMOD (F 35 H-MOD)	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 designation "PM-01" on your PCB and the 10-digit code marked: 0020023308 or 0020028479.
Compare this code with that of your PCB: Registered confirmation: 0020023308 for the Isomax F35 HMOD and 0020028479 for the Isotwin F30 H-MOD.
To confirm: Do not mix them with 0020048284 (=0020023308, without explanation) or with 0020027894 and 0020027893, which are for Isotwin F 30 and F 25.
Also compare the terminals: the 0020023308 marks 24 V and capacitors of 250 V~; the 0020028479 has terminals of 230 V and 24 V and a relay K15 of 230 V.
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 user commands.
Cause: To confirm: it is related to the PCB 0020028479; first check power supply and fuses.
02
The display shows erratic fault codes or strange faults.
Cause: It indicates a faulty PCB, especially if the boiler shuts down by itself.
03
Spontaneous resets during normal operation
Cause: They are mentioned alongside stuck relays or burnt tracks, visible on the PCB.
04
The boiler does not ignite: the room thermostat flashes with fault code 01 or 04.
Cause: The burner does not ignite or the flame is not detected. There may be a lack of gas.
Press the thermostat button and follow its instructions. If it appears again, have a technician check it.
05
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.
06
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.
07
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.

Fault codes Saunier Duval that require diagnosis

Code	Fault	Technical checks
F.28	Start-up fault: ignition does not complete.	Code with a dot, typical of the Isofast Condens. It may be due to the gas, ignition, or the PCB; have a technician check it.
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.

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: PLC059
Brand: Saunier Duval
Type of part: Saunier Duval
Units in stock: 6 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 — Terminal annotation: 24 V
Inventory — Subcomponent capacitors: 250 V~
Inventory — Application indicated in inventory: Saunier Duval ISOMAX F35 HMOD
Identification — Marked designation: PM-01
Identification — Marked code: PM-01
Identification — Marked code: 0020023308
Inventory data — Terminal annotation: 24 V
Inventory data — Subcomponent capacitors: 250 V~
Inventory data — Application indicated in inventory: Saunier Duval ISOMAX F35 HMOD
Additional markings: PCB silkscreen: PM-01. Capacitors/subcomponents marked 250 V~. The text does not provide additional subcomponent codes.
Pending applications to verify: Saunier Duval Isomax F35 HMOD — compatibility cited; pending confirmation. Consultation 24/10/2026 · 1 supplier; pending confirmation: Isofast F 35 E H-MOD; Isomax F 35 H-MOD. Commercial statement for your sheet "PCB Saunier Duval (0020023308)0020048284", no certification of the unit. Confirm OEM reference, revision, configuration, and equipment variant before use.

Before purchasing

To confirm: Saunier Duval Isotwin F25 EH-MOD: (0020028479); gives 0020027893 for the F 25 E H-MOD.
To confirm: Saunier Duval Isofast E 35 H MOD — valid: it writes 0020023308 but it contradicts itself (does not count); it writes it cut off, "002002330" (ambiguous)
Not compatible or excluded: Saunier Duval Isotwin F 30 E H-MOD — they provide another PCB: 0020027894
Do not confuse: 0020048284 — Board sold with code 288.66.0058 and written alongside 0020023308 — without additional confirmation explain the equality with 0020023308: compare the code of your board.
Do not confuse: 0020027894 — Main PCB ("Carte principale") of the Isotwin F 30 E H-MOD; it is for the F 30 H-MOD — Another code; none of those mention 0020028479 or 0020023308. Registered confirmation: 0020028479 for the F30 H-MOD.
Do not confuse: 0020027893 — Main PCB for the Isotwin F 25 E H-MOD — Another code; gives 0020028479 for the F25 EH-MOD: they differ.
Not confirmed: PM-01 or V-GROUP. The user manual for the Isomax F 35 H-MOD does not show the codes, and the reviewed fragments of the installation manual do not either. Do not assume that 0020023308, 0020028479, and 0020048284 are equivalent without comparing them with your PCB.
An origin by code: (0020023308), (0020028479). also write 0020023308, but it contradicts (ISOMAX F35E H-MOD / ISOFAST E 35 H MOD) and does not count. other PCBs for the Isotwin. The reviewed manuals do not mention PM-01.
Pending registered applications to confirm by model, variant, or programming: Saunier Duval Isomax F35 HMOD (F 35 H-MOD).

Frequently Asked Questions

Frequently asked questions: Saunier Duval

How do I identify this PCB V-GROUP PM-01?

Look for the designation PM-01 on the plate and the 10-digit code marked: 0020023308 on our Isomax F35 HMOD unit and 0020028479 on the Isotwin F30 H-MOD unit. Also compare the terminals: the first one marks 24 V and capacitors of 250 V~; the second one, 230 V and 24 V and a relay K15 of 230 V.

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

Check the status of each model in the compatibility sections; the pending variants are not validated. Registered application: the PCB with code 0020023308 for the Isomax F35 HMOD. The list with that code for the Isomax F 35 H-MOD states 0020048284=0020023308, but its page contradicts itself: the header says ISOMAX F35E H-MOD, the name ISOFAST E 35 H MOD, and the category ISOTWIN C 30. We do not count it for the ISOMAX F35 HMOD. The user manual for the Isomax F 35 H-MOD does not show the code, and in the reviewed fragments of the installation manual, it does not appear either.

Is it compatible with my Saunier Duval Isotwin F30 H-MOD?

Check the status of each model in the compatibility sections; the pending variants are not validated. Registered application: the PCB with code 0020028479 for the Isotwin F30 H-MOD. Provide that code for the Isotwin F30 H-MOD 3s and the F25 EH-MOD. Provide another PCB, 0020027894, for the F 30 H-MOD: compare the code marked on your PCB.

What is the difference between 0020023308 and 0020028479?

They are two different Saunier Duval codes. Our two units have the same designation PM-01, but one is marked 0020023308 (Isomax F35 HMOD) and the other 0020028479 (Isotwin F30 H-MOD). Without additional confirmation, they consider them equivalent: choose the one that matches the code of your PCB.

What does 0020048284=0020023308 mean in some technical sheets?

The technical sheet of 0020023308 and the technical sheet of 20048284 state it without explaining the equivalence. It gives 0020048284 as the manufacturer code for its PCB 288.66.0058, with the Isomax F35H-MOD in its table, and does not mention 0020023308. We cannot say they are the same part: compare the code marked on your PCB.

Is it the same PCB as 0020027894 or 0020027893 from other Isotwin models?

It is not listed. They provide 0020027894 as the main PCB for the Isotwin F 30 E H-MOD; it is also given for the F 30 H-MOD. They provide 0020027893 for the F 25 E H-MOD. None mention 0020028479 or 0020023308: compare the code of your PCB.

What symptoms point to this PCB and who should install it?

what does 0020028479 sell: does not ignite or does not respond, erratic errors on the display, spontaneous restarts, stuck relays or burnt tracks; first check power supply and fuses. It is not advisable to install it without experience and it asks to cut the power. It is recommended to have a qualified technician; the unit 0020028479 has 230 V terminals.

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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V-GROUP PM-01 PCB · 0020023308 / 0020028479 · Saunier Duval Isomax F35 E Isotwin F30