This replacement pneumatic cover ensures that your 1-pipe or 2-pipe T-4000 series instruments remain calibrated and protected in high-traffic environments

leak-free seat within the burner manifold assembly during installation

making it a go-to component for contractors managing 24V control circuits

5 threads of engagement for more secure fastening than stamped helix designs

Carrier HK660006 Pressure Switch Kit Els PW 17895 This replacement pneumatic cover ensuresThe Carrier HK660006 Pressure Switch Kit serves as a critical safety component for furnace and air handler assemblies, designed to verify proper inducer motor operation and adequate venting before ignition. This genuine OEM replacement part is the direct replacement for HK02AC027, resolving issues associated with the older, obsolete switch design. In a typical furnace sequence, this HVAC pressure switch monitors the pressure differential created by