As a homeowner, you must embrace the maintenance cycle if you want to have a functional home. This is essential because a home's infrastructure, including appliances and electronics, degrades over time. For example, with time, people's HVAC systems have deteriorated...
Troubleshooting Your Air Conditioner
SEARCH
24-Hour Emergency Service
Troubleshooting Your HVAC
What Are the Most Common HVAC Problems?

Troubleshooting Your Air Conditioner
Troubleshooting your air conditioner system begins with a few common sense checks. If your air conditioning does not seem to be working, there are several things to rule out before you have to contact a professional. Checking these things first can save you a lot of aggravation and possibly money as well.
Thermostat

Checking your thermostat first is the best place to start troubleshooting your Air Conditioner not working. The three things to check here would be:
- Is there power to your thermostat. If it is powered by battery, you may need to change the battery.
- Make sure your thermostat is set to “Cool” mode.
- Be sure the temperature selection is set below the current room temperature.
Air Filter(s)

Your air filters can become clogged and restrict the air flow which can cause the unit to shut off. Make sure your air filters are clean. They need to be changed usually every three months or every month if you have pets or high traffic.
It does not take much debris to clog them and affect air flow, so if in doubt, change them.
Shut Off Switch
Many units will have a master shut off switch. Make sure that if your system has a shut off switch that it is turned on.
Circuit Breaker
For further troubleshooting, next look at your home’s circuit breakers to make sure that none of the breakers is tripped. If you do need reset the breaker, do it only once. A circuit breaker can be tripped and still look like it is on. Therefore, it is wise to just reset it anyway to be sure. Locate the circuit breaker to your air conditioning unit and turn it off, then click it back on.
Drain Pan

Check the drain pan under your indoor air conditioning unit. If it is full, then empty it. A full drain pan can trigger a float switch which can keep your system from coming on. If the drain pan is full, then it is likely that your drain pipes are clogged. The drain pipes will also need to be cleaned out or blown out so that the water can be evacuated before it accumulates.
What Next?
Once these troubleshooting steps have been checked and your system is still not working, it is time to call your air conditioning specialist. There are many components that if they fail can cause your system to not operate. Any of these issues should only be addressed by a licensed professional or damage can occur. Also a warranty can be voided and there can be costly and potentially dangerous hazards.

Air Doctor Heating and Air
is fully licensed and accredited. We offer:- Very Experienced Technicians who work on all brands of HVAC equipment.
- Competitive pricing and value.
- Financing options, short and long term for installations and repairs.
- 10 year warranty on Parts and Labor for new installations.
- Outstanding Customer Service.

HVAC Licenses
- MD HVAC # 17747
- WV HVAC # 07874
- VA HVAC # 2710071510
- PA HICR # PA152515
Recent Posts
Spring Pollen? Allergies? Air Cleaners Help!
Spring makes HVAC air purification especially important because pollen, mold spores, dust, and other allergens surge, and your system can either trap them or circulate them through every room. A well‑maintained HVAC with proper filtration dramatically reduces indoor...
Prepare Your HVAC System for Spring
Getting your HVAC system ready for spring starts with a few high‑impact tasks that improve efficiency, prevent breakdowns, and prepare your home for warmer weather. Spring is the ideal time because your system is transitioning out of winter heating and into heavier...
Dramatic Benefits of Cold Climate Heat Pumps
Cold‑climate heat pumps offer major advantages in regions that see freezing or sub‑zero temperatures, combining strong winter performance with lower operating costs and improved comfort. These cold climate heat pump systems are engineered specifically to overcome the...
Advantages of a Mini Split System
Why Choose a Mini‑Split HVAC System? Mini‑split HVAC systems have exploded in popularity because they solve problems that traditional ducted systems simply cannot. They offer flexibility, high efficiency, and personalized comfort, making them a strong option for both...
Mold Dangers from Your HVAC System
Mold caused by a Heating and Air Conditioning system is more common than people realize, and it is usually due to moisture control problems inside the system or the home. Just a small imbalance in moisture can create the perfect environment for mold growth. How Much...






