August 9, 2018 Air ConditionersInfo Articles

Three of the Most Common Causes of AC Failure

Did you ever experience going home from a hot day at work, you turn the AC on and instead of making you feel cool, it actually puffs warm air? Now that’s something no one can be excited about!

Not every homeowner puts that much effort into thinking about their cooling system. In fact, air conditioners are easily neglected until they begin to act weird or how signs of failure.

Marsh Heating and Air Conditioning is your trusted HVAC company in Brooklyn Park MN that offers top-tier AC maintenance process that can ensure your air conditioner will stay in great shape. Below are some of the most common reasons why AC systems fail.


Your cooling system, just like any other piece of equipment, is bound to accumulate dust, debris, and filth that can affect the appliance’s performance. These airborne particles often collect in the condensing coil resulting in reduced efficiency and compromised cooling capacity. In more severe cases, the air conditioner may even create ice due to a filthy condensing coil. When you notice an ice buildup around the copper lines of your unit, you will experience a subpar performance from your cooling system.

Your air conditioner pulls air in through the condensing coil, and to keep it working efficiently, it has to be clean inside and out. If you don’t mind getting your hands a little dirty, you can simply turn the circuit breaker off, remove that unit’s covering, and with the use of a hose or compressed air, clean the inside and outside components of the air conditioner. However, if special coil cleaning is needed, you may require the help of a qualified AC professional.


Your AC’s thermostat is the device that controls the system. It is responsible for dispersing the comfortable temperature throughout your home. If you have a traditional thermostat, they could be improperly calibrated, which means your AC isn’t getting the right commands from the system. To effectively fix this issue, you may need to recalibrate your thermostat. Your user’s manual is a great place to start to do this. To make things simpler, you can invest in a programmable thermostat, which offers a number of benefits that include scheduled temperature setting.

If your AC constantly turns itself on and off, you would want to make sure that the thermostat is free from any dust buildup. Dust, nicotine, and residues from volatile organic compounds such as household sprays can affect the electrical and mechanical components of the thermostat. With the use of a brush or a can of compressed air, clean the thermostat’s interior parts.

There are some thermostats that rely on mercury switches that could easily be thrown off if there aren’t perfectly level. You may have to adjust the thermostat or its mounting bracket to make sure it sits completely level.


Your air conditioner uses refrigerant to remove the heat and humidity from the air in your home. If your AC develops leaks in the system, the refrigerant can easily escape in the air without you even knowing since it is an invisible gas. Without the right amount of refrigerant, your AC won’t be able to effectively cool the air. Not only does operating an air conditioner with low refrigerant levels makes you feel uncomfortable, it also can cause serious damage to your unit. One of the visible proofs of a refrigerant leak is ice buildup. Connected to your outdoor unit, there is a copper line that is reserved for your refrigerant. Your evaporator coil will send the refrigerant through a line and if the refrigerant is low, the coils get too cold and eventually ice up. This can cause damage to the compressor since it is not designed to compress liquids but gas. If you suspect that you have a refrigerant issue, it’s best to have a qualified cooling professional perform the job for you.

Get the Best AC Services from Marsh Heating and Air Conditioning

The single best way to keep your air conditioner operating smoothly and efficiently is to have it regularly checked by a licensed AC technician. If your cooling system gives you a headache instead of comfort, call Marsh Heating and Air Conditioning. For over 40 years, we have been the preferred Maple Grove AC repair contractor that delivers no less than outstanding cooling products and services.