The housing does not determine calibration
The colour of the label and the external resemblance are not enough to choose the Replacement part. Confirms the marking and version; it is not proposed to modify its setting.

Vaillant VMW ES 21/245/4-5 R3 air pressure switch, refurbished. White circular pressure switch with a label and two terminals, attached to a short port. Compare the indicated setpoint, pressure ports and electrical contacts with the installed pressure switch.
Compare the full code, Ports and terminals. Two Pressure switches can share housing and have a different calibration.
Compare the views from the same angle and check the complete identification of the removed part.
Choose a photo of your part to view it beside this unit. Compare the labels, connectors and mounting points from the same angle.
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Application listed in the catalogue: Vaillant VMW ES 21/245/4-5 R3. The variant and configuration must match the installed equipment; this does not establish compatibility with other models.
No models are documented for that search.
The application is listed in the catalogue and must be checked against the installed variant. Compatibility has not been confirmed against an exploded parts diagram.
The colour of the label and the external resemblance are not enough to choose the Replacement part. Confirms the marking and version; it is not proposed to modify its setting.
We repair boilers in Madrid and the surrounding areas. Installation is arranged separately from the purchase of the part.
Check the dialing, Ports and the terminals of the unit removed.