PCB Thermowatt Ariston/Chaffoteaux Ref. 740190001707 (740150001707)
PCB manufactured by Thermowatt. The printed circuit board is marked with the code 740150001707; the catalog and several independent spare parts listings use 740190001707 for the same part. It has a blue transformer module from Comelit installed. It is compatible with Ariston boilers (BS, CLAS, EGIS, GENUS 24-32 FF) and Chaffoteaux (Niagara, Pigma, Talia).
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 740190001707
- Warranty
- 1 year
Ariston boilers compatible with reference 740190001707
PCB with reference 740190001707. A proven compatibility: AS 24 FF.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Ariston AS 24 FF | AS / ASFF (Ariston) | Contrasted |
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 the reference 740190001707 is the part for your boiler
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 740190001707. If it is not visible, do not identify the part by its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms that require diagnosis on the PCB 740190001707
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 does not ignite and the display, if it has one, remains completely off.
Cause: The transformer and the electronics of the PCB are what power the rest of the system; without output, nothing starts.
Check the fuse on the PCB and ensure that the blue transformer is not short-circuited before replacing it.
- 02
A fault code from the sensor is triggered, but after replacing the sensor, the fault still appears.
Cause: The PCB misinterprets the signal even though the physical component is correct, due to wear of the reading stage.
Measure the resistance of the indicated sensor with the multimeter at room temperature before considering the PCB as the culprit.
- 03
The control or the thermostat have no effect: whether you request heat or not, the boiler behaves the same.
Cause: The communication bus of the PCB is not processing the command it receives from the thermostat or the remote control.
Check the continuity of the thermostat wiring up to the terminal block on the PCB before replacing the board.
- 04
The boiler turns off and on by itself several times a day without a clear pattern.
Cause: The relays or capacitors on the PCB are intermittently failing and causing these micro-cuts.
Check if the cut coincides with another consumption in the same electrical panel before replacing the component.
Ariston fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 3 01 | EEPROM display error | The EEPROM on the main PCB is damaged or not reading/writing correctly, preventing initialization. Check 5 V/12 V on the PCB, solder joints/continuity of the EEPROM, and reprogram or replace the PCB if necessary. |
| 3 02 | Communication error | Communication bus fault of the PCB (BridgeNet/GP‑GIU) with the display or peripherals due to a circuit fault in the PCB. Check wiring/power supply and bus signals; if they are correct, the cause is in the main board. |
| 3 03 | Main PCB fault | Self-diagnosis detects a fault in the control electronics (CPU/timing/regulators) of the PCB. Check the stability of the power supply, reset/oscillator, and if external factors are ruled out, replace the board. |
| 3 05 | Main PCB fault | Generic fault of the PCB (logic or control stage) preventing safe operation. Check voltages on the board, tracks/relays/triacs, and replace the board if the issue persists. |
| 3 06 | Main PCB fault | This symptom may be related to the part, but it does not confirm that it is faulty. A technician must check the equipment and its inspection according to the manual before deciding on a repair or replacement. |
| 3 07 | Main PCB fault | Internal error on the main PCB detected by self-diagnosis. Check sources/clock and ensure there are no shorts in outputs; if everything is correct, replace the PCB. |
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 Ariston PCB 740190001707
- Catalogue reference
- 740190001707
- Uniclima internal SKU
- PLA-ASFF24
- Brand
- Ariston
- 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 manufacturer
- Thermowatt
- Code printed on PCB
- 740150001707
- Code used in the spare parts market
- 740190001707
- Transformer module
- Comelit Mod. 1181422311GE
- Comelit is the manufacturer of the blue transformer module, not the complete PCB; the PCB is from Thermowatt.
- The model 'ASFF 24' from the previous catalog title is not listed among the confirmed boiler models; the established compatibility is with the Ariston BS/CLAS/EGIS/GENUS series and Chaffoteaux Niagara/Pigma/Talia indicated.
Frequently asked questions about the PCB 740190001707
Who manufactures the PCB Ref. 740190001707 for Ariston and Chaffoteaux?
Is the code 740150001707 printed on the circuit and the reference 740190001707 from the catalog the same PCB?
Which boiler is compatible with the Thermowatt PCB Ref. 740190001707?
What fault codes are compatible with this PCB?
What module is mounted on the Thermowatt PCB Ref. 740190001707 in addition to the main circuit?
What is the reference for this PCB?
Spare parts related to Ariston AS / ASFF (Ariston)
