Common Air Conditioning Problems

A musty or mildewy smell may indicate your AC system has a mold problem. Dead animals could also cause clogs or leaks in your ductwork.

If your home cools some rooms better than others, this might be due to a faulty thermostat or air vent blockage. You can recalibrate the thermostat or clean the vents. Click https://hubbardmechanical.com/ to learn more.


The evaporator coil is one of the most important parts of your air conditioning unit. When this part freezes, it’s a clear sign that you must fix the problem immediately. Read on to learn more about the evaporator coil, how it freezes, and what you can do about it.

The most common reason for an AC evaporator coil to freeze is a dirty air filter. The clogged filter restricts the airflow that the coil needs to warm up and change the pressure in the system. Changing your air filters will help to avoid this issue.

Another cause for a frozen coil is a blocked condensate drain line. This pipe carries away excess moisture that is caused by humidity. If it becomes clogged, it can result in water back-up that may flood your home and damage your unit. A professional technician can inspect and clean the drainage line for a clog.

A malfunctioning thermostat is another air conditioning problem that could lead to a frozen evaporator coil. The thermostat fails to properly signal the cooling system to run long enough to heat up and cool down the house. A professional can test the thermostat to make sure it is working correctly.

An air conditioner with a low refrigerant charge can also cause the evaporator coil to freeze. The refrigerant chemical runs through the evaporator coil, changing pressure and temperature to remove heat from your home. A professional can find and fix any leaks in the refrigerant lines to prevent this issue from happening again.

A faulty blower fan can also stop the cooling system from moving air through the evaporator coil. A professional can inspect the blower fan and fix or replace it. To avoid this problem, you can check the area around your air conditioner to ensure it is free from obstructions, such as rugs and furniture, that could block the flow of air. In addition, you should periodically clean the blower fan to avoid excessive dirt build-up.

It’s not unusual to see an air conditioner with a frozen thermostat. It’s a common AC problem that can be easily fixed but can also be a sign of a more serious issue with your system. The best thing to do is shut off the system and check for ice. Once the coils are thawed, you can call an air conditioning professional to determine what caused it and the next steps.

Usually, the most obvious reason an AC unit froze is that there isn’t enough warm air over the evaporator coil. This can be due to a dirty air filter, a malfunctioning blower motor, a clogged or closed vent, or ductwork plugged, collapsed, or undersized.

A jarring bump or a blown-out bulb can knock it out of alignment if you have a digital thermostat. This can cause it to set the wrong temperature, leading to a frozen coil or other air conditioning problems. It’s a good idea to replace the batteries and clean the thermostat regularly to prevent this.

Another simple way to solve this problem is to open all your vents and ensure they’re not blocked by furniture or draperies. It’s also a good idea to unplug any normally closed vents with nothing in front of them so they can get the airflow they need.

This is a common issue with older air conditioning systems, especially if they need regular maintenance. It’s easy to forget about things like changing the air filters and cleaning evaporator coils, but these simple tasks can help keep your system running well and reduce the risk of a frozen system.

If you have hot and cold spots in your home, it’s likely because the air conditioner isn’t evenly cooling or heating all areas. A professional HVAC technician can use manual J to determine how many CFM per room your system needs to maintain proper temperatures and balance the airflow with internal dampers.

Blocked vents, clogged filters, or open windows usually cause uneven airflow. It’s important to check for each of these before calling in an AC service professional.

If your home has a lot of furniture blocking the air vents, some rooms are always hotter or cooler than others. The air has to travel farther to reach those rooms, and the extra distance causes heat loss. This also puts more strain on your AC unit, which could lead to high energy bills.

Closing or closing your vents to save money might help in the short term, but it can make your system work harder and cause many problems. You can solve this problem by checking the vents and ensuring they aren’t closed or obstructed.

When your filter gets dirty, it can clog and restrict the flow of conditioned air to the rest of your home. A clogged air filter can also cause the air conditioner to work harder to cool your house.

Over time, ductwork can lose its seal, allowing conditioned air to escape before reaching its intended destination. If you have leaky ducts, it’s important to have them repaired as soon as possible before they cause major problems.

Improper installation or design issues often cause an unbalanced HVAC system. A qualified HVAC professional can add or remove air vents, seal and insulate accessible ducts, or add dampers to existing ductwork to help balance the cooled airflow throughout your home. The best solution to uneven airflow is a zoned air conditioning system, which divides your home into different zones that can be controlled separately from each other.

When a wire becomes loose, it can cause problems with other components in your air conditioning system and be dangerous. Loose electrical connections can lead to arc faults, electrical fires, and electrocution. Electrical wiring should be left to licensed professionals. If you do need to try to repair a wire connection yourself, it is important that you first turn off power at the switchboard and use appropriate tools such as wire nut or push-in connectors. Then, ensure adequate wire insulation and that any exposed copper ends are protected by the appropriate materials, such as plastic or rubber, to avoid further damage.

Some of the most common air conditioning problems with electrical connections are caused by faulty or outdated wiring, tripping circuit breakers, and even damaged capacitors. Fixing these issues without the right experience can be extremely dangerous and lead to expensive damage or even death.

Electrical problems with your AC can be incredibly complex and often require the attention of trained electricians with years of experience. This is particularly true of electrical problems involving your circuit breaker, capacitor, and other complex wiring components. Suppose you are still determining whether the wiring, the breaker, or something else causes your AC electrical problem. In that case, turning off the power and contacting an electrician is always best.

If your air conditioner trips the breaker, it could be due to many problems, including dirty filters, a capacitor that isn’t functioning properly, or a compressor that is too old. However, it may also be caused by a loose or cut wire, overheating wire, an oversupply of electricity, or a faulty relay or thermostat. A qualified technician should be called to perform a complete inspection and diagnosis before any further damage or injury can occur.

If you notice that a wire is exposed, it should never be touched. It is possible that the insulation has deteriorated or pests have chewed through it. This can be a serious safety issue; if you feel it, you could get a nasty shock. If a wire is bare, it should be re-insulated by a professional, and the technician should also check for any other signs of electrical problems.