Blog by Jeff Shinner (Jones Technician)
The heat is coming soon to the Midwest just like it always does!
As you probably have learned the main purpose of a vehicle air conditioning system is to remove the humidity from and lower the temperature of the ambient air before that air enters your vehicle cabin.
Here are a few things to think about as you get your vehicles ready:
Check your cabin air filter! It filters the outside air as it enters the temperature control system. If it is dirty, it will reduce the air flow that keeps you cool in the summer and warm in the winter.
Is one side of your vehicle’s air conditioning blowing colder air than the other side?
Your system may be low on refrigerant or you may have a blend door issue. Low refrigerant can also cause your front A/C unit to blow colder than the rear unit.
Are you missing a fan speed on your blower system? That can be caused by a faulty blower motor resistor.
Beware of the “Do-it-yourself” A/C charging kits found in the auto parts stores: Refrigerant charge quantities are very critical in most vehicles today and it is impossible to know exactly how many ounces are needed to bring your system to the specified level of refrigerant. In addition, the “Do-it-yourself” charging kits can contain leak stop sealers and/or additional refrigerant oil which can reduce the efficiency of your A/C system and even damage the compressor.
Have you noticed a bad smell coming from your dash vents? That could be caused by: a mouse nest in your evaporator/heater case. Yes, that happens. They can get into the smallest opening. Or that smell may be caused by a leak in the heater core or evaporator coil which eventually will cause dirt and debris to collect on the coils producing mold and mildew.
Now is the time to take your vehicle to an experienced shop to have a spring check-up.