Discovering signs of a malfunctioning HVAC system is crucial for maintaining a comfortable home. If you're asking yourself, 'How do you know if your HVAC is broken?' be vigilant for red flags such as inconsistent temperature control, strange noises, or a sudden spike in energy bills. Whether your vents are blowing warm air instead of cool, or vice versa, or if you detect unusual odors, these can be clear indicators that your HVAC system requires attention. Additionally, pay heed to poor airflow and unexpected increases in dust or humidity levels, as they may signal a malfunction. Identifying these issues early and addressing them promptly can help prevent more extensive and costly repairs in the future.