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.

Chaffoteaux Calydra Comfort 28 FF air pressure switch, reconditioned. Honeywell pressure switch with a square base, black front with two ports, and metal back with a microswitch. Compare the specified setting, 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.
Two Ports, viewfinder and square frame. Compare views from the same angle and complete Part identification removed.
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: Chaffoteaux Calydra Comfort 28 FF. 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 Honeywell Base square, black front with two Ports and metal reverse with microruptor. Compare these details with the removed Part and its complete identification.
Two Ports, viewfinder and square frame. Compare views from the same angle and complete Part identification removed.
This product page identifies the catalogued application Chaffoteaux Calydra Comfort 28 FF. It does not establish equivalence with other versions; service documentation linking Part to the specific model is required to extend compatibility.