Honeywell UC6012 3-Way Valve Actuator - Saunier Duval Master Twin L85E

Saunier Duval boilers compatible with reference 05133500

3-way valve with reference 05133500. Four confirmed compatibilities: Thelia Twin 28 and Thelia Twin 28 E.

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. 05133500 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 05133500. 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 3-way valve 05133500

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

  The boiler does not switch between domestic hot water and heating.

  Cause: The actuator does not turn the valve when it receives the command, so the water continues to circulate through the same circuit.

  Check if the actuator physically moves when opening a hot water tap; if nothing turns, the fault points to the motor or its power supply.

• 02

  It remains fixed on a single service (domestic hot water or heating) even when the other is requested.

  Cause: The internal gear of the actuator has worn out or become disengaged and no longer drives the valve stem.

  With the actuator removed, check if the valve turns smoothly by hand; if it does, the problem is only with the actuator.

• 03

  Motor noise without the valve moving

  Cause: The gear motor turns but the pinion has lost engagement with the valve shaft.

  Listen to see if the buzzing stops after a few seconds (motor reaching full speed) or continues indefinitely (loose gear).

• 04

  Boiler warning or error related to the 3-way valve or its actuator

  Cause: The control unit does not detect that the actuator has completed its cycle and locks the boiler for safety reasons.

  Write down the exact code displayed on the screen before replacing the part, to confirm that it points to the actuator and not another component.

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 Saunier Duval 05133500 three-way valve.

Catalogue reference

05133500

Uniclima internal SKU

EV3VMTL85E

Brand

Saunier Duval

Type of part

3-way valves

Units in stock

3 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.

Manufacturer

Honeywell

Product code

UC6012

Voltage and frequency

200-240 VAC 50/60 Hz

Power

6 VA

Race time

6 seconds

Degree of protection

IP40

Thermal class

T6S TS110

Country of manufacture

Canada

Batch code

9901

Manuals and technical documentation

Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.

• Saunier Duval THELIA TWIN 28 E Manual (PDF) Document © Saunier Duval, provided as a technical reference.