Not sure what’s going on with your heating or cooling system? Use our Quick HVAC Troubleshooter below to walk through simple, step-by-step questions about your mini split, central A/C, boiler, furnace, or water heater. This tool will help you identify common problems you can check yourself, or let you know when it’s time to schedule professional service. Just select your system type and follow the prompts if you’re ever unsure, you can restart or request help at any time.