Heating and air conditioning symptoms
When your heater or air conditioner is running but not heating or cooling, not running at all or leaking water inside the house, you'll need to take action fast. Our symptoms and troubleshooting solutions guide you through the steps to fix common heater and air conditioner failures. Get the repair parts you need by entering the part number or your HVAC system model number in the search bar. Follow the steps in the heating and air conditioning repair guides to install replacement parts and get the HVAC system working again.
Choose a symptom to see related heating and air conditioning system repairs.
The flame sensor detects when furnace burner flames are lit. You may need to replace the flame sensor if flames only stay on for a few seconds.
The condensate drain line for your central air conditioner can clog with mold and mildew. Water will back up and start dripping below the inside air conditioner unit. Follow the steps in this guide to unclog the drain pipe.
The control thermostat for your HVAC system can stop working. This repair guide shows how to replace it.
Learn the reasons why you should consider replacing a gas furnace with an electric heat pump.
Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.