Flow Detector for Junkers Cerastar Boiler ZWN24-7MFA

Flow detector that measures the flow of domestic hot water and activates the burner ignition when water flow is detected. The part has a 3-wire electrical connector (red, yellow, black) with a white 3-pin terminal, as seen on the label. Compatible with Junkers Ceraclass, Ceranorm, Cerapur, Cerastar ZWN24-7MFA, ZWC24-1MFA, and Elm Leblanc ACLEISGLMV5. The replacement requires first confirming the fault of the part through technical diagnosis, even when the boiler does not recognize the demand for hot water.

Type of part: Flow detectors
Status: Refurbished
Catalogue reference: 87167724000
Warranty: 1 year

VAT included Stock · 7 units

Compatibility

Junkers boilers compatible with reference 87167724000

Flow meter with reference 87167724000. Six confirmed compatibilities: ZWC 24-1MF/1MFA and ZWC 24/28-1MF.

Proven compatibility

Boiler model	Family	Verification
Junkers ZWC 24-1MF/1MFA	Euromaxx	Contrasted
Junkers ZWC 24/28-1MF	Euromaxx	Contrasted
Junkers ZWC 28-1MF/1MF2	Euromaxx	Contrasted
Junkers ZWC 28/32-1MFA	Euromaxx	Contrasted
Junkers ZWC 28-3MFK	Ceraclass Excellence	Contrasted
Junkers ZWC 24/28-3MFA	Ceraclass Excellence	Contrasted

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 ref. 87167724000 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 87167724000. 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.

Diagnosis and fault codes

Symptoms that require diagnosis in the flow meter 87167724000

The flow meter detects the passage of water to activate the domestic hot water. These are the typical symptoms and what to do:

Common symptoms and faults

01
You open the hot water tap and the boiler does not ignite the burner, although everything else works fine.
Cause: The flow detector does not send the signal to the PCB to ignite the burner.
Open the tap fully and check if it ignites with a higher flow rate: if it only fails with low pressure, suspect a dirty filter first.
02
The domestic hot water comes in bursts, turning on and off by itself while you use the tap.
Cause: The internal turbine is dirty or scaled, which causes an irregular water flow signal.
Close and open the tap several times in a row; if the ignition is erratic, first check if there is a dirty inlet filter.
03
The 3-pin electrical connector is loose, broken, or has corroded pins.
Cause: Without the electrical signal, the boiler does not receive information even though the water circulates well.
Before replacing the part, disconnect and reconnect the white terminal and check that the pins are not bent or corroded.
04
The domestic hot water flow in the house is normal, but the boiler still does not detect demand.
Cause: If the detector is jammed, it does not sense the movement of water even if the flow rate is correct.
Check the general pressure of the installation on the pressure gauge: with low pressure, the actual flow may not be sufficient to activate the detector.

Junkers fault codes that require diagnosis

Code	Fault	Technical checks
CA	Turbine revolutions too high.	The DHW turbine/flow meter (flow sensor) sends pulses at an abnormal frequency due to a fault in the sensor itself, dirt/breakage of the magnet, or wiring issues; verify by reading the pulse signal from the flow meter and checking the condition/cleanliness of the turbine.

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

Data sheet for Junkers flow meter 87167724000

Catalogue reference: 87167724000
Uniclima internal SKU: SCZWN24
Brand: Junkers
Type of part: Flow detectors
Units in stock: 7 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.

Electrical connector: 3 wires (red, yellow, black) ending in a white 3-pin connector

Frequently Asked Questions

Frequently asked questions about the flow meter 87167724000

Is this flow detector suitable for the Junkers Cerastar ZWN24-7MFA boiler?

Yes, the flow detector SCZWN24 is compatible with the Junkers Cerastar ZWN24-7MFA boiler and also with other models from the 'Euromaxx' and 'Ceraclass Excellence' ranges.

Which models are compatible with the flow detector SCZWN24?

The flow detector SCZWN24 is compatible with the following models: ZWC 24-1MF/1MFA, ZWC 24/28-1MF, ZWC 28-1MF/1MF2, ZWC 28/32-1MFA, ZWC 28-3MFK, and ZWC 24/28-3MFA.

What fault indicates that the flow detector SCZWN24 needs to be replaced?

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.

What type of connector does the SCZWN24 flow detector use?

The SCZWN24 flow detector has a white 3-pin connector with red, yellow, and black wires, according to the part label.

What fault code is associated with the flow detector SCZWN24?

The documented fault code for this product is CA.

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Flow Detector for Junkers Cerastar Boiler ZWN24-7MFA