Pressure Switch Code 605.99030 For Vaillant Boiler VC/VCW E - Ref. 050518

Vaillant boilers compatible with reference 050518

Pressure switch with reference 050518. Six confirmed compatibilities: VC 112 E and VC 182 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. 050518 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 050518. 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 pressure switch 050518 resolves.

The pressure switch controls the air or water pressure to authorize operation. These are the typical symptoms and what to do:

Common symptoms and faults

• 01

  The boiler locks out with a fault warning related to air pressure.

  Cause: The pressure switch does not close the contact as it should, and the control board thinks there is not enough draft.

  Check that the silicone tube going from the pressure switch to the flue is not detached, cracked, or filled with water.

• 02

  The burner does not start even though the fan is working properly.

  Cause: If the pressure switch does not close the contact, the gas valve does not receive the command to open for safety reasons.

  Check the electrical connections of the pressure switch; a loose wire can cause the same symptom as a faulty component.

• 03

  The boiler stops by itself from time to time, without a clear pattern, and it needs to be reset.

  Cause: A faulty connection in the pressure switch can cause intermittent cuts, even if the air pressure is correct most of the time.

  Gently move the pressure switch wires while the boiler is running to see if the fault recurs; this would indicate a loose connection rather than a break.

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.

Vaillant 050518 pressure switch datasheet

Catalogue reference

050518

Brand

Vaillant

Type of part

Pressure switches

Units in stock

5 units

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.

Component code

605.99030

Switching pressure

45/28 Pa

Electrical contact data

0.2(0.1) A / 30V~ [label text not entirely clear, possible voltage figure cut off]

Batch

050547

Certification

VDE-Reg-Nr. 2421

Manuals and technical documentation

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

• Vaillant Manual 605 99030 (PDF)Document © Vaillant, provided as a technical reference.