Carrier ZONEBB3ZHP01 Zone Control 320819-301 Use a 5/64" hex wrench

Use a 5/64" hex wrench to adjust the bias

Broad Compatibility: Serves as a 1:1 drop-in replacement for obsolete 21-807 and N800-0804 swivel joints

or a failing blower motor that isn't pulling enough heat off the exchanger

including those under the Heil

providing reliable ignition and consistent manifold pressure

Carrier ZONEBB3ZHP01 Zone Control 320819-301 Use a 5/64" hex wrenchThe Carrier ZONEBB3ZHP01 is a professional grade 3 zone control system engineered for precise atmospheric management in residential and light commercial applications. This HVAC zone controller allows for independent temperature regulation across three distinct areas, significantly enhancing HVAC system efficiency by directing airflow only where needed. Designed for versatility, the ZONEBB3ZHP01 is compatible with heat pump systems and multi stage