As a genuine International Comfort Products replacement part

Can I use this switch for standard altitude units

Look for inducer motor operation without ignition or LED fault codes on the control board indicating the pressure switch failed to close or stayed open

For technicians managing multi-zone air handling units or specialized building automation systems

its primary function is to redirect internal cabinet air pressure away from the pilot assembly to prevent blow-outs

Johnson Controls KZ-4000-4 Relay Els PW 17895 As a genuine International ComfortJohnson Controls KZ 4000 4 General Purpose Relay, 24 Vac, SPDT Contacts