HVAC Troubleshooting - What you should do before you call for service

Air Conditioner adjustments and repairs should be done by professionals. An air conditioning unit is much more complex than it seems. There are refrigerant gases, brazing joints, compressors, fans, coils, fins, electrical starters, thermostats, overload switches, filters, dryers, lubricating oil, drain pans, insulation, mountings, control systems, remote sensing and many other components that only a professional should handle.


When Should I call a Professional – About 1-2% of the calls we get could have been solved by the homeowner without the help of a professional. There are some simple things you can do before calling a service technician that might save you the expense of a service call.

1) Check your Circuit Breakers – Make sure that the circuit breakers for the air conditioner and heater in the electrical service panel are “on” and that none of the fuses have blown. If the circuit breakers or fuses blow a second time do not reengage as there is a further problem. Consult a professional (like United Air Conditioning of Central Florida 352-314-3665)

2) Check for the Correct Settings on your Thermostat – You would be surprised how many calls are due to incorrect settings on the thermostat. Remember if you want air conditioning, make sure the thermostat is set below room temperature and the system switch is in the “Cool” or “Auto” position. If you want heating make sure the thermostat is set above room temperature and the system is set to “Heat” or “Auto” position. The fan switch should be set to the “On” position for continuous fan operation or “Auto” for the blower to work only while the unit is active.

3) Check for Obstructed Airflow – Make sure that the air filters are clean and that there is nothing blocking the return air and that all the ceiling grills are open and unobstructed.

4) Decide if you need Professional Maintenance or Repair – Your Home Comfort System (HVAC) should be professionally maintained at least once a year (we recommend that Heat Pump systems be maintained twice a year) by a properly trained service technician. They can make sure your system works safely, gives you top notch performance and runs more efficiently which adds life to your system. Properly diagnosing a HVAC takes expensive specialty tools, testing equipment and most importantly proper training and experience. Some people who have mechanical knowledge and access to tools may think they can repair their own unit. Most will find that this is the most costly way of doing the job because HVAC systems have sensitive and expensive parts which can be damaged from improper services. Also there is the very real chance of getting hurt.

If these above procedures don’t correct the problem call United Air Conditioning of Central Florida, Inc. @ 352-314-3665 for service.