HVAC & Air Conditioning

VRF system not cooling one zone

One indoor zone failing while others work

Professional service required

A single zone reports no cooling

Likely causes

· Indoor filter or coil loading
· Electronic expansion valve fault
· Address or communication fault

Safe preliminary checks

· Clean the indoor filter and confirm airflow
· Confirm the zone is not in a schedule or set-point lock
· Record the indoor unit address and the code shown

When it needs a professional

Refrigerant-side diagnosis requires certified HVAC work.

Stop immediately if

· Smoke, burning smell or water on live parts
· Refrigerant leak, gas odour or pressure vessel noise