Hydraulic Component For Boilers ZW1KE And ZW20 Ref. 8707002628

Junkers boilers compatible with reference 8707002628

Hydraulic group with reference 8707002628. 30 verified compatibilities: ZW20KD23S2805 and ZW20KD23S2895.

Proven compatibility

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. 8707002628 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.

1. Find the reference printed on the installed part and check whether it matches the catalogue reference 8707002628. If it is not visible, do not identify the part from its shape alone.
2. Check the full boiler model on its data plate and look for it in the model associations on this page.
3. Compare the connections and physical body with the original part before installation.
4. If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.

Symptoms and faults that the hydraulic group 8707002628 resolves.

The hydraulic group includes the valve, the by-pass, and the water connections. These are the typical symptoms and what to do:

Common symptoms and faults

• 01

  The hot water comes out in intervals and changes temperature for no apparent reason.

  Cause: This hydraulic component regulates the flow of water between the primary circuit and the domestic hot water; if it gets stuck or loses tightness, the mixture becomes uncontrolled.

  Check that the cold water inlet filter is not clogged with limescale before declaring the part defective.

• 02

  A water leak appears at the bottom of the boiler, especially when starting the domestic hot water.

  Cause: The gaskets and the body of this component seal the passage between circuits; over time they can crack or lose elasticity.

  Locate the exact point of the leak with the boiler running and dry the area to rule out that it comes from a nearby fitting that is not tightened properly.

• 03

  The boiler heats the heating system, but it does not provide hot water when the tap is opened.

  Cause: A fault in the hydraulic circuit prevents the control board from detecting the demand for domestic hot water and activating the burner in DHW mode.

  Open the tap to maximum flow and check that the mains pressure has not dropped below the minimum required by the boiler to start.

• 04

  There is noticeable vibration or flow noise in the pipe when opening the hot water.

  Cause: Partial obstruction or internal calcification of the component causes turbulence in the water flow.

  Check if the noise depends on the inlet pressure by slowly opening the tap before replacing the part.

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 Junkers hydraulic group 8707002628

Catalogue reference

8707002628

Brand

Junkers

Type of part

Hydraulics

Units in stock

5 units

Status

Refurbished

Warranty

1 year

Shipping

1-2 business days

Return

14 days