As car owners, we push a few buttons or turn some knobs, and voila, we have warm air blowing on our feet or cool air chilling our face. How does all that happen? Well, it’s all thanks to the air blend box. This box lives behind the dash and conveys just the right temperature of air right where it is wanted.
Let’s break it down. First there is the blower fan that circulates the air through the heating/air conditioning system. The fan can blow at different speeds, depending on how much hot or cold air is required to be comfortable. The blend box can either deliver fresh air from outside, or recirculate air from inside the cabin. Saskatoon auto owners often choose to recirculate air when first starting the vehicle until it starts to either cool down or warm up. In recent weeks it was recommended to only recirculate air in the vehicles due to the forest fires and the high air quality health index.
The next thing the blend box does is convey airflow over the heater core to warm the air, or over the air conditioner evaporator core to chill it – it can also blend both hot and cold to get it just right. From there the blend box can direct the air out into the passenger compartment through the floor vents, the panel vents, the defroster, or a combination. All of this allows drivers to customize the climate just the way the like it.
Some vehicles have different climate control zones, like one for the driver and one for the passenger – or even more zones for the back seat. Additional blend boxes are used for this. Climate controls could be manually adjusted or computer controlled depending on your vehicle.
The blower motor and all of the little actuator motors that open and close the various blend doors can fail and need to be replaced. Most new vehicles come with a cabin air filter. This filter cleans the air before it gets into the blend box. If you neglect changing the cabin air filter, it can get clogged, smelly, and even allow mildew and other microorganisms to build up in the blend box.
At Crestview Auto Service, we can carry out a heating/air conditioning system-cleaning service that will clean and disinfect the system, restoring a fresh clean scent. If you are not getting enough hot or cold air, let us inspect your system, diagnose the cause and set things right. Also, don’t forget to replace the cabin air filter on schedule. Keep in mind; if you live and drive in dusty conditions or where there is a lot of pollen or other pollutants, you may need to replace your cabin air filter more frequently. We are here for you.
Crestview Auto Service
24 23rd St E
Saskatoon, SK S7K 0H5