3-Way Valve for Excellent D Micro LN 24 E Boiler, Ariston Genus and DivaTech
The 3-way valve for the Excellent D Micro LN 24 E boiler, Ariston Genus, and DivaTech is a component that switches water between the heating circuit and the domestic hot water circuit. When it fails, you may notice that there is hot water but no heating, or vice versa, or even that both circuits are mixing. This model is compatible with boilers from the Cointra Excellent range, Ferroli Divatech, Ferroli Divacondens, and Ferroli FERtech, among others. It is advisable to replace it if you experience the mentioned symptoms or if the fault code F43 appears: No water circulation.
VAT included
Consult via WhatsAppCointra boilers compatible with reference 39842120
3-way valve with reference 39842120. 18 confirmed compatibilities: Excellent D Micro LN 24 E and Excellent Micro LN 24 E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Cointra Excellent D Micro LN 24 E | Cointra Excellent (D) Micro LN | Contrasted |
| Cointra Excellent Micro LN 24 E | Cointra Excellent (D) Micro LN | Contrasted |
| Cointra Excellent Micro LN 32 E | Cointra Excellent (D) Micro LN | Contrasted |
| Cointra Divatech C D | Ferroli Divatech / Divatech micro LN | Contrasted |
| Cointra Divatech F D | Ferroli Divatech / Divatech micro LN | Contrasted |
| Cointra Divatech F N | Ferroli Divatech / Divatech micro LN | Contrasted |
| Cointra Divatech micro LN C D | Ferroli Divatech / Divatech micro LN | Contrasted |
| Cointra Divatech micro LN F D | Ferroli Divatech / Divatech micro LN | Contrasted |
| Cointra Divacondens F | Ferroli Divacondens | Contrasted |
| Cointra Divacondens E | Ferroli Divacondens | Contrasted |
| Cointra FERtech C D | Ferroli FERtech / FERtech micro LN | Contrasted |
| Cointra FERtech F D | Ferroli FERtech / FERtech micro LN | Contrasted |
| Cointra FERtech F N | Ferroli FERtech / FERtech micro LN | Contrasted |
| Cointra FERtech micro LN C D | Ferroli FERtech / FERtech micro LN | Contrasted |
| Cointra FERtech micro LN F D | Ferroli FERtech / FERtech micro LN | Contrasted |
| Cointra Ferpro C | Ferroli Ferpro / Fercondens | Contrasted |
| Cointra Ferpro F | Ferroli Ferpro / Fercondens | Contrasted |
| Cointra Fercondens F | Ferroli Ferpro / Fercondens | 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 ref. 39842120 is the part for your boiler
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 39842120. If it is not visible, do not identify the part from 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 and faults that the 3-way valve 39842120 resolves.
The 3-way valve diverts water between heating and domestic hot water. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
In summer, when requesting only hot water, the radiators heat up a bit for no apparent reason.
Cause: If the gas valve does not close properly, some of the hot water leaks into the heating system even when it is turned off.
Touch the heating pipes while only requesting hot water; if they are warm, it is a sign that the valve is not sealing properly.
- 02
Warm or irregular temperature water is coming out of the tap.
Cause: The valve may be in an intermediate position, mixing both circuits.
Open and close the tap several times; if the temperature varies significantly, the valve may be stuck in intermediate positions.
- 03
Do you see dripping or water leakage in the area of the gas valve?
Cause: Over time, the internal seals or the body of the gas valve may lose tightness.
Dry the area well and check after using the boiler for a while to see if the leak is coming from the gas valve.
- 04
The valve makes a rubbing or vibrating noise when switching modes.
Cause: The accumulated scale inside the body can hinder the rotation of the internal mechanism.
If the installation has not been descaled for a while, consider cleaning the circuit before replacing the gas valve.
Fault codes for Cointra that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F43 | There is no water circulation. | There is no circulation in the water system, which triggers the protection of the heat exchanger. This may be caused by a fault in the 3-way valve that prevents the proper flow of water. |
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 Cointra 39842120 three-way valve.
- Catalogue reference
- 39842120
- Brand
- Cointra
- Type of part
- 3-way valves
- Units in stock
- 1 unit
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- Voltage
- 220-240V
- Frequency
- 50/60Hz
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Cointra Ferroli Divatech / Divatech micro LN Divatech C D manual (PDF)Document © Cointra, provided as a technical reference.
Frequently asked questions about the 3-way valve 39842120
Does this 3-way valve fit an Ariston Genus?
What voltage does the valve of the Excellent D Micro LN 24 E operate at?
Does this valve have an electric motor?
When should this valve be replaced in a Ferroli Divacondens boiler?
How many models are compatible with the valve MV3VLN24E?
What fault code is documented for this gas valve?
Spare parts related to Cointra Ferroli Divatech / Divatech micro LN
