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.

Ariston Genus 27 BFFI air pressure switch, refurbished. White circular pressure switch with a red central disc, upper terminals, mounting posts and a lower tube. 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.
Disc color, upper terminals and lower socket Tube. Compare views from the same angle and 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: Ariston Genus 27 BFFI. 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.
Pressure switch circular white with red center disk, upper terminals, fixation columns and lower Tube. Compare these details with the removed Part and its complete identification.
Disc color, upper terminals and lower socket Tube. Compare views from the same angle and complete identification of the removed Part.
This product page identifies the catalogued application Ariston Genus 27 BFFI. It does not establish equivalence with other versions; service documentation linking Part to the specific model is required to extend compatibility.