This article from WSV Group Inc. lists five key indicators suggesting your HVAC system requires immediate professional attention. These signs include unexpectedly high energy bills, weak or warm air from vents, strange odors emanating from the system, frequent thermostat adjustments, and a constantly running system. The article explains the possible causes behind each sign and recommends troubleshooting steps, urging readers to contact an HVAC technician for persistent issues to avoid costly repairs. The article concludes with a call to action, encouraging readers to contact WSV Group for HVAC services.