Why is my air con blowing warm air?

Wednesday 9th October 2024



No matter what time of year it is, if you turn the car’s air conditioning on and it only blasts hot air, you may have an issue with the A/C. A broken air con system that regularly blows warm air inside the car can make your overall driving experience uncomfortable for you and your fellow passengers.

Our article explains the reasons why your vehicle’s A/C is blowing warm air.

Low refrigerant levels

Refrigerant is an essential liquid that is converted to a gas when used in your vehicle’s air conditioning system. If your A/C is running low on refrigerant, it may require a re-gas. However, if the air con is leaking refrigerant, it must be repaired before topping it up with new refrigerant. Locate your local branch, and our trained aircon technician can repair your car’s A/C and re-gas it for you.

A malfunctioning electrical system

The air conditioning system inside your car is powered electronically via various wires, relays, fuses and switches.

Faulty wiring or blown fuses can shut down your vehicle’s electrical system, leading to only warm air being blown out of the A/C system. If your car’s electrical system is malfunctioning, we recommend taking your vehicle to your nearest Formula One Autocentres garage to get it fixed.

Faulty compressor

The compressor is essential for a functioning car air conditioning system. It is responsible for pressuring the refrigerant and circulating it throughout the A/C to keep you and your passengers cool or warm. You must keep the compressor running regularly to ensure your vehicle’s aircon continues to function.

A clogged air filter

Over time, the air filter inside your car’s A/C system becomes clogged with dust, dirt and debris.

A clogged air filter can blast warm air from the vents inside your vehicle, creating unpleasant smells. This can be caused by mould and bacteria growth in the air filter, which could affect your health. Also, a dirty air filter can affect your vehicle’s performance, leading to increased fuel consumption and the engine warning light illuminating your dashboard.

Regularly cleaning your air filters will ensure that your car’s air conditioning system works effectively.

The cooling fans are broken

Inside your car’s A/C, the cooling fans are a crucial component for blowing air into the cabin. If the fans are chipped, cracked or jammed due to debris, like leaves or dirt, it can prevent the air con from blowing air. Damaged cooling fans must be replaced to avoid further damage to your car’s air conditioning system.

Understanding the reasons why your car’s air con is only blowing warm air can ensure your air conditioning continues to keep your car at the optimum temperature all year round. Is your vehicle’s air con system not working? Our article looks at why the air conditioning doesn’t work in your car.

Get your car’s air conditioning serviced by booking it online at your nearest Formula One Autocentres branch today.

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