When your air conditioning system is producing little to no cool air, you must address the issue ASAP. Some problems are far too complex to fix yourself, so you should call an HVAC technician to repair it. Other situations, however, are relatively simple to fix yourself. Follow this guide to determine what is causing the problem, and how to fix it.
If your system won’t turn on…
- Set your thermostat to “cool,” not “heat” or “off.”
- Make sure the temperature on the thermostat is set below the current room temperature.
- Reset the circuit breaker and replace any blown fuses.
- Set all switches around the unit to “on” including the external safety switch next to the condensing unit.
- Check for excess water in the condensate overflow tray – some units have a sensor that turns the unit off when there is water in the tray.
- Close the blower door on the air handler tightly.
If there is insufficient air flow from indoor vents…
- Check that the filter is clean – it may need to be replaced.
- Inspect the ductwork for parts that appear disconnected or bent, and repair as necessary.
- Set the register dampers on indoors vents to an open position.
If the system is not adequately dehumidifying
- Close all windows in your home so no humid air is able to get inside.
- Check to see that the condensate drainage is functioning properly.
- Use a portable dehumidifier to supplement the cooling system.
If you are unable to solve the problem using this guide, be sure to contact Heatmasters – our skilled technicians have the right tools to repair your system quickly as possible.
Courtesy of About.com Home Repair
