Auxiliary Heat Is On but No Warm Air? Solve It Fast – Use This Common Thermostat Troubleshooting Chart From Filterbuy.com

Welcome to the audio version of the following web page: https://hvac.filterbuy.com/resources/troubleshooting-guides/why-is-auxiliary-heat-on-but-no-heat-comes-out-and-common-thermostat-troubleshooting-chart/ In this episode, we break down why your auxiliary heat may be running but no warm air is coming out of your vents. From thermostat misconfigurations and heat pump issues to airflow restrictions and electrical problems, we explain the most common causes behind this frustrating situation. You’ll also learn how to use a simple thermostat troubleshooting chart to identify potential problems before calling for service. If your system says “Aux Heat” but your home still feels cold, this episode provides practical guidance to help you understand what’s happening and what steps to take next. When auxiliary heat runs but no warm air reaches your living space, the issue may involve thermostat settings, airflow restrictions, or heat loss caused by poor insulation and inefficient air sealing. Pairing proper attic insulation with correctly sized filters such as 20x20x1, 19.5x22x2, 16x20x1, or 13x21.5x2—available through retailers like Amazon, Walmart, eBay, Home Depot, and Target—and selecting the right MERV rating helps improve airflow, reduce indoor pollutants, and support more consistent heating performance.