What to Do If Your Air Conditioner Smells Like Gas?

What to Do If Your Air Conditioner Smells Like Gas?

It is very unpleasant if you’ve ever been to a house where the air conditioner smells like gas. You must act immediately if this happens to you because the odor may indicate a gas leak. Some gas leaks are toxic and must be checked immediately to avoid worsening the situation. Check the air conditioner carefully if you are concerned about the smell.

The Air Conditioner Itself:

Check the air conditioner before using it if it smells like paint or formaldehyde. Companies use different types of liquids in air conditioners. When the device is not in use, it can emit various chemical odors. For proper diagnostics, contact your local HVAC service provider.

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What Should You Do If You Notice a Gas Leak Smell on Your Air Conditioner?

If your home air conditioner smells like gas, you must act quickly.

  1. Disconnect The AC Power Adapter:

Turn off the air conditioner first if you smell any odor. You must immediately unplug the device. There could be a gas leak if the odor comes from the vents.

  1. Open Windows And Door:

If you smell gas coming from your air conditioner, you must act as soon as possible. As a result, open all doors and windows to ventilate the space. Evacuate the area immediately if necessary. In this case, you keep everyone safe from unpleasant odors.

  1. Find The Leak:

Once you clear the area, try to identify the source of the problem. If the odor comes from the air conditioner, it could be due to dirt on the filter or an obstruction in the airflow. Sometimes, the chemical reaction between the refrigerant and the insulation can produce a gas-like odor.

  1. Contact A Professional:

If you cannot determine the source of the problem yourself immediately, please contact an HVAC expert. AC professionals have the tools and knowledge to locate the source of a gas odor and ensure the system’s safety. Do not ignore the gas smell coming from the air conditioner. Take the above steps and act immediately! You can keep your home safe and comfortable by acting quickly and resolving issues.

Also, note that most HVAC companies treat problems like this as high-priority operations, so they would send their technician much sooner to identify and rectify a gas leak smell than install a new system or conduct routine maintenance work.

Also check: 6 Tips For Preparing Your HVAC For The Summer.

What Can You Do Yourself For The Leak?

Check for Leaking Refrigerant:

A refrigerant leak is a common reason for an odor coming from your air conditioner that smells like gas. You can run a quick check if you think this is the problem. After turning off your air conditioner, check for any liquid or oil buildup in the evaporator coils. If you see a leak, it might be the cause of the smell; for repairs, you should get in touch with a qualified HVAC technician.

Examine the Gas Pipes:

Certain air conditioning systems require gas lines as a necessary component, particularly in bigger or commercial HVAC systems. The gas lines may be to blame if you detect a gas smell close to your air conditioner. Examine the area for any obvious damage, broken connections, or other indications of a Gas Leak. However, to manage the problem securely, avoid doing any do-it-yourself fixes and call a professional.

Change The Air Filters:

An unclean or clogged air filter can occasionally cause a stench resembling gas. When the air filter is obstructed, airflow may be limited, and the evaporator coil may freeze or overheat, which could result in strange odors. You can avoid this problem by cleaning or replacing your air filter on a regular basis.

Adequate Ventilation:

For any potential gas smells in your house to be dispersed, proper ventilation is crucial. Make sure your house has enough ventilation, and use exhaust fans sparingly in the restroom and kitchen. Maintaining adequate ventilation aids in avoiding the buildup of gas smells.

The Most Common Causes:

If you’ve ever wondered why your house smells like a gas station, the most probable culprit is your natural gas supply connected to your heating system or cooking stove. The second most likely culprit is your air conditioner. As a by-product of the cooling process, the AC unit emits gas. This gas can enter the house if there is a leak in the unit. Various factors, including loose fittings, valve damage, and hose rupture can cause gas leak odors.

The following are the most common causes of an air conditioner emitting a gas-like odor:


Dust accumulates over time and can cause issues with the air conditioner, such as a gas smell. You can take the following steps to resolve the smell issues.

  • First, replace the filter regularly. It keeps dust from gathering in the first place.
  • Next, inspect the coil and wipe it down with a soft cloth when you smell the air conditioner.
  • Finally, to avoid dust build-up, regularly clean the area around the unit.

Exhaust Pipe:

Exhaust pipes keep smoke and other contaminants away from the air conditioner. However, those contaminants can enter the home if they become damaged or clogged. If the damage is severe enough, you may need to replace the entire line. Also, check the ducts if you find your air conditioner smelly.

Compost Or Garbage:

When compost decomposes, it emits a gas that smells like sulfur or rotten eggs. This is Hydrogen Sulfide gas, and it is toxic. If you notice this odor coming from your air conditioner, you must get it repaired by a professional. Otherwise, you could be exposed to the gas. Fortunately, there are numerous methods for removing the odor of compost. You can add venturi sticks to your compost pile. Consider using a Compost Filter.

Also check: Why AC Compressor Not Working but Fan Is Running?


The compressor oversees moving the refrigerant throughout the air conditioning system. Leaks in the compressor can allow the refrigerant to escape and mix with the air conditioning system’s lubricating oil. The oil then circulates with the refrigerant, potentially producing a gas odor. A wheezing sound may accompany a leak in some cases. It is best to contact a professional air conditioning repair technician if you suspect that the compressor is leaking.


Freon is a common refrigerant found in air conditioners. Freon is used in some air conditioners. Freon is a refrigerant that, if leaked, emits an unpleasant odor. If you suspect a Freon leak, open the window, and get the unit inspected by a qualified technician. In the meantime, avoid inhaling smoke.

The Dangers of an AC Gas Leak Smell:               

Many people are familiar with the odor of gas leaks in air conditioners. But few people are aware that this gas is hazardous.

Excessive breathing can cause dizziness, nausea, and even death. Furthermore, if the gas encounters an open flame, it can explode. As a result, it is critical to be aware of the dangers of gas leak smell from air conditioners and take precautions to avoid inhalation.

Preventative Measures To Address This Issue:

You can take some steps to avoid the gas leak smell from your air conditioner.

  1. First, ensure that the air conditioner is serviced regularly. This helps with detecting potential gas leak smell before they become a problem.
  2. Next, inspect the air conditioner filter. The air conditioner may overheat and emit an unpleasant odor if the filter becomes clogged.
  3. Finally, keep the ventilation slots and grill clean. Dust accumulation can also cause overheating alongside odors.

Contact A Professional To Detect The Gas Leak Smell!

It is important to act if your home has an air conditioner that smells like gas. Follow the previous tips to ensure that you and your family feel safe and comfortable in your own home. If you notice an odor coming from your air conditioner, contact K2 Heating and Cooling immediately! With years of experience in the HVAC industry, our expert technicians are certified and educated to identify the problem and recommend appropriate solutions.


About Author

Mobeen Shahid

Mobeen Shahid

Mobeen Shahid is a Mechanical Engineer with two years of experience in the HVAC industry. His passion is analyzing HVAC issues, and he works relentlessly to devise customized solutions. He has been in the industry long enough to know the ins and outs and ensures that areas are optimally heated, cooled, and ventilated.

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