Hydraulic Block With Circulator For Baxi Roca Neobit 24/24 F And Sara 24/24 - Ref. 122153440

Baxi Roca boilers compatible with reference 122153440

Hydraulic group with reference 122153440. Four confirmed compatibilities: Neobit 24/24 F and Sara 24/24 F.

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. 122153440 is the part for your boiler

The part reference, model, and equipment revision must be verified against the manufacturer's documentation.

1. Find the reference printed on the installed part and check whether it matches the catalogue reference 122153440. 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 that require diagnosis in the hydraulic group 122153440

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 radiators are not heating even though the burner ignites and operates normally.

  Cause: The circulator is not moving the water, so the heat is not reaching the circuit.

  Check if the circulator is buzzing without spinning; sometimes it is enough to unlock the shaft with a screwdriver on the front screw before replacing the block.

• 02

  Loud humming or vibration noise in the lower area of the boiler, especially when starting up after the summer.

  Cause: The circulator rotor has seized due to lime deposits accumulated during the summer shutdown.

  Try to manually unjam the shaft and bleed the air from the circuit before considering the circulator blocked.

• 03

  A puddle of water appears right under the black plastic body where the pipes connect.

  Cause: The internal seals of the hydraulic block have lost their tightness, and water is seeping through the joints.

  Dry the area well and check again after a heating cycle to confirm that the leak is coming from the block and not from a nearby fitting.

• 04

  The domestic hot water works fine but the heating doesn't start, or vice versa.

  Cause: The block distributes the water between the two circuits, and an internal switching fault leaves one of them without flow.

  Check that the heating and domestic hot water demand activate the circulator separately before attributing it to the block.

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 Baxi Roca hydraulic group 122153440

Catalogue reference

122153440

Uniclima internal SKU

HBN2424F

Brand

Baxi Roca

Type of part

Hydraulic units

Units in stock

6 units

Status

Refurbished

Warranty

1 year

Shipping

Delivery time shown at checkout

Return

14 days