Vaillant TL-AC PM-01 PCB · 0020092478 for VU 246/3-5 R5
Control PCB for gas boiler, with application pending confirmation. Issues with starting, burner ignition, or lockouts require diagnosis before replacement.
- Type of part
- Vaillant
- Status
- Refurbished
- internal SKU
- PLCN015
- Warranty
- 1 year
Compatible Vaillant boilers
Vaillant. Four confirmed compatibilities: Vaillant VU 246/3-5 R5 and Vaillant VC 126-306/3-5 (R3, R5). There are another 8 models that we are still verifying.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Vaillant VU 246/3-5 R5 | Vaillant | Contrasted |
| Vaillant VC 126-306/3-5 (R3, R5) | Vaillant | Contrasted |
| Vaillant VMW 296/3-5, VMW 296/3-5 R3 and VM 376/3-5 | Vaillant | Contrasted |
| Vaillant VMW 346/3-5 | Vaillant | 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.
| Vaillant VU 246/3-5 | Vaillant | Unconfirmed |
|---|---|---|
| Vaillant VU 246/3-5 R3 | Vaillant | Unconfirmed |
| Vaillant VU 156/3-5 R3 and R5 | Vaillant | Unconfirmed |
| Vaillant VUW 296/3-5 R5 and VUW 346/3-5 R5 | Vaillant | Unconfirmed |
| Vaillant VCI 196 and 246/3-5, VCW 196 and 246/3-5 (R3, R5) and VCW 196/3-5 A | Vaillant | Unconfirmed |
| Vaillant VMW 296/3-5 R5, VMW 346/3-5 R3 and R5, VM 376/3-5 R3 | Vaillant | Unconfirmed |
| Vaillant VM 246/3-5, VM 246/3-5 R3 and VM 376/3-5 R5 | Vaillant | Unconfirmed |
| Vaillant VM 346/3-5, VM ES 366/3-5 and VMW ES 306, 346 and 386/3-5 | Vaillant | Unconfirmed |
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 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 label attached with the code 0020035420 and the marking 90930009 N0167.11.03 on the PCB model TL-AC PM-01.
- Compare with the reference Vaillant 0020092478, the one on the packaging and the .
- Check the rating plate of your boiler. It lists the VU 246/3-5 R5 with model codes 0010004352 and 0010004353.
- Do not confuse it with 0020041165 (previous PCB of the VC) or with 0020052093 (VU 246/3-5 in the official catalog of 2008).
- If they match, call us at 911 17 77 77 with your boiler model and we will reserve it for you.
Symptoms that require diagnosis in the Vaillant.
Common symptoms and faults
- 01
The boiler does not start, the burner does not ignite or gets blocked.
Cause: It is quoted for this PCB. Have a technician confirm it before replacing it.
- 02
Erratic faults, spontaneous restarts, or faulty modulation
Cause: They quote it for this PCB.
- 03
The boiler does not ignite: after three attempts without a flame, the fault code F.28 appears and it goes into fault mode.
Cause: Gas shortage or ignition failure, faulty electrodes or damaged PCB.
If it repeats, have a technician check it. Do not attempt to reset multiple times in a row.
- 04
The boiler shuts down during operation and the restart fails (fault code F.29).
Cause: Temporary gas cut, gas recirculation, condensates, or faulty grounding.
Have a technician check it.
- 05
The gas valve does not activate: the boiler stops with fault code F.61.
Cause: Fault in the wiring or in the coils of the gas valve, or faulty PCB.
Have a technician check it.
- 06
The boiler does not ignite or turns off during operation, with the warning F28 or F29.
Cause: Ignition or flame failure: gas, electrode or gas valve.
Check that the gas valve is open and reset once. If it returns, have a technician check it.
- 07
The boiler locks out with the warning F61 or F62: fault in the gas valve or in the PCB.
Cause: Faulty gas valve or PCB with fault.
Do not manipulate it. Have a technician check it.
- 08
The boiler does not ignite and locks out with F28 or F29.
Cause: Flame is not detected when igniting, or the flame goes out and does not reignite: lack of gas, ignition failure, or electrode fault.
Check that the gas shut-off valve is open. If it remains blocked, have a technician check it.
- 09
F.27 appears with the heating stopped.
Cause: Flame detection without demand (parasitic flame).
Do not insist: it is a security fault. Have a technician check it.
- 10
The boiler does not ignite and shows F.28.
Cause: Failed ignition attempts: flame not detected.
It could be related to the gas or the electronics.
- 11
Three ignition attempts without flame and the boiler locks out with F28.
Cause: Lack of flame when igniting: gas closed or with low pressure, ignition electrode or burner defective.
Check that gas is reaching and reset once. If it blocks again, have a technician check it.
- 12
The boiler shows F27 with the burner off.
Cause: Moisture in the electronics, faulty PCB or gas valve that does not close completely.
Have a technician check it; do not try to resolve it yourself.
- 13
F65 appears and the boiler's electronics are hot.
Cause: Insufficient ventilation around the boiler or excessive heat from the surroundings.
Ensure the ventilation of the area. If it reappears, have a technician check it.
- 14
F61 or F62 appears related to the gas valve.
Cause: Wiring of the valve, the valve itself or the control board.
Turn off the boiler and do not tamper with it. Have a technician check it.
- 15
The boiler does not ignite: after several attempts, F.28 appears and it gets locked.
Cause: It does not detect flame during ignition: gas, ignition, ionization, or electronics.
Check that the gas valve is open. If it still does not ignite, have a technician check it.
- 16
The boiler shuts down during operation and does not restart; fault code F.29 appears.
Cause: The flame goes out and the retries fail: gas supply interrupted, incorrect grounding, or flue gas recirculation.
Reset a maximum of three times. If it repeats, have a technician check it.
- 17
The boiler stops due to lack of water and fault code F.22 appears.
Cause: Water pressure too low: lack of water, faulty pressure sensor or pump.
Fill the installation according to the manual and bleed the radiators. If the pressure drops again, have a technician check it.
- 18
When starting the heating, F.75 appears and the boiler does not start working.
Cause: Faulty pressure sensor or pump, air in the system or low water.
Bleed the radiators and check the pressure. If it continues, have a technician check it.
- 19
A fault code F.61 to F.67 appears and the boiler locks out.
Cause: Gas valve, defective EEPROM or electronic board.
Do not reset multiple times. Have a technician check it.
Vaillant fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| F.28 | Start-up fault: after three attempts without flame, the boiler goes into fault. | If it repeats, have a technician check it: it could be the gas, the electrodes, or the PCB. |
| F.29 | Flame loss during operation and failed reignition. | If it repeats, have a technician check it: it could be the gas supply, the flue gas recirculation, the grounding, or the ignition. |
| F.61 | The gas valve does not activate properly: fault in the wiring, coils, or PCB. | Have a technician check it. Point to the PCB if the wiring of the gas valve is correct. |
| F.62 | The gas valve takes time to close after the flame goes out. | Have a technician check it: it could be the gas valve, the electrode, or the PCB. |
| F.63 | Fault in the memory of the PCB (EEPROM). | It usually points to the PCB: have a technician check it. |
| F.67 | The flame signal is not valid: fault in the electronics or ionization. | If it goes out when turning on, have a technician check the PCB and the ionization. |
| F27 | Flame detected with the burner off. | It is a security fault. Have a technician check it immediately. Focus on the electrode, the gas valve, or the PCB. |
| F64 | Short circuit or fault in the NTC sensor, or internal fault of the PCB. | If it appears, the PCB or the NTC sensor may fail; have it checked by a technician. |
| F65 | The boiler's electronics are too hot. | It is usually due to insufficient ventilation around the boiler. Ensure proper ventilation; if it reoccurs, have a technician check it. |
| F.22 | Water pressure too low. The boiler shuts down to protect itself. | Check the circuit pressure on the manometer and refill according to the manual. If the pressure drops again, there is a leak or a fault with the pressure sensor or the pump: have a technician check it. |
| F.75 | When starting the pump, the pressure in the circuit does not rise. | Check the pressure and bleed the radiators. If the fault code persists, it points to the pressure sensor or the pump: 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.
Vaillant
- Uniclima internal SKU
- PLCN015
- Brand
- Vaillant
- Type of part
- Vaillant
- Units in stock
- 1 unit
- 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.
- Type of part
- Printed circuit board
- Commercial reference of the spare part
- 0020092478
- PCB model
- TL-AC PM-01
- PCB code on attached label
- 0020035420
- Secondary marking of the label on the PCB
- 90930009 N0167.11.03
- Serial number indicated for the spare part
- 13545443V
- Power supply and terminals
- 230 V~; L, N and ground
- 230 V thermostat input
- RT 230 V~; terminals 3, 4, and 5
- 24 V thermostat input
- RT 24 V; terminals 7, 8, and 9
- Communication bus
- BUS; polarity +/−
- Labeled connection
- Anl. Therm.
- Relay
- ZETTLER AZ943-1CH-12DE
- Visible connectors
- X20, X22, X40
- Other visible connectors
- X13, X18, X11, X10, X12, X2, X1
- Source of additional data
- Declared information; auxiliary references and applications without equivalent from the accredited manufacturer.
- Inventory — Application indicated in inventory
- Documented application for reference 0020092478 of the packaging: Vaillant VU 246/3-5 R5.
- Additional data — Operating voltage
- 230 V
- Additional information — Weight of the spare part
- 0.54 kg · (0.541 kg) · gives 1 kg
- Pending applications to verify
- Statements from (documentation 23/10/2026; revision 24/10/2026), pending confirmation by the manufacturer. Check reference, revision, and serial number before use: VM 246/3-5 · VM 246/3-5 R3 · VM 376/3-5 · VM 376/3-5 R3 · VM 376/3-5 R5 · VMW 296/3-5 · VMW 296/3-5 R3 · VMW 296/3-5 R5 · VMW 346/3-5 · VMW 346/3-5 R3
- To confirm: Vaillant VU 246/3-5 —, but the official catalog from 2008 lists 0020052093.
- To confirm: Vaillant VU 246/3-5 R3:; and (they match in 7 designations of VU and VUW; count as one)
- Vaillant VU 156
- To confirm: Vaillant VUW 296/3-5 R5 and VUW 346/3-5 R5 —; and they provide the variant VUW FR.
- To confirm: Vaillant VCI 196 and 246/3-5, VCW 196 and 246/3-5 (R3, R5) and VCW 196/3-5 A: (3 German and 1 Czech) with the same list and
- To confirm: Vaillant VMW 296/3-5 R5, VMW 346/3-5 R3 and R5, VM 376/3-5 R3 —
- To confirm: Vaillant VM 246/3-5, VM 246/3-5 R3 and VM 376/3-5 R5
- To confirm: Vaillant VM 346/3-5, VM ES 366/3-5 and VMW ES 306, 346 and 386/3-5 — (another copy of your text)
- Do not confuse: 0020041165 — Front PCB of the VC 126-306/3-5 — states that 0020092478 replaces it. If your PCB has it, consult us.
- Do not confuse: 0020052093 — PCB of the ecoTEC plus 624 VU 246/3-5 in the official catalog of 2008 — Prior to the R3 and R5 and without the 0020092478 in that catalog: do not consider them equivalent without verifying it.
- Do not confuse: 0020092421 — PCB provided for the VC DE 196/3-5 R3 — One only, without checking. If you have that boiler, consult us.
- Registered confirmation: that the label 0020035420 and the circuit TL-AC PM-01 correspond to the reference 0020092478. Compare the three codes.
- To confirm: they join the 0020092478 with the VU 246/3-5 R5 (and as one); the label and circuit confirm it. give the 0020035420 for the VC DE 126/3-5 (send); privately, the 0020092421 for the VC DE 196/3-5 R3.
Frequently asked questions: Vaillant
How do I identify this Vaillant TL-AC PM-01 PCB?
Is it compatible with my Vaillant VU 246/3-5 R5?
Does it fit in other Vaillant boilers besides the VU 246/3-5 R5?
What do the codes 0020035420, TL-AC PM-01, and 0020092478 mean?
Is it the same as 0020041165 or 0020052093?
What faults are associated with this PCB?
Who should install this PCB?
