When the system goes down, heating and cooling being absent can provide a miserable atmosphere in the cabin of the car. There are a lot of parts in an HVAC system and this makes for a number of areas where problems may arise. When you look at common issues in the system, you can pinpoint the problem you are having and can quickly work to correct it.
Heater Core: The heater core in a vehicle usually won’t go bad. If the heating is deteriorating this usually means a leak or other issue is present in the cooling system. Though a quick visual inspection of the heater core will tell you whether or not it will need to be replaced due to leaks or other damaged areas.
Blower Motor: A blower motor can burn up and when it does no air can be cycled through the system. If no air is being blown through the vents when the heat is turned on you will want to check fuses and wiring for the system before opting to replace the unit.
Dampers: The dampers in a ventilation system are used to direct air to particular areas of the vehicle. If air is blowing through the system but not being directed appropriately it’s a sign the dampers will need to be replaced.
Recharging A/C: A/C systems need to hold a proper charge in order to cool the air. If the A/C is starting to produce less and less cold air, the typical problem is the system will need to be recharged.
Converting from R12: R12 is a harmful and potentially dangerous component that is obsolete. Many will want to update their system to run R134a as it is an environmentally friendly alternative and is a non-flammable substance. The only issue with R134a is that it doesn’t work to cool air as well as R12 does. One can run R134a through a system designed to use R12 but the A/C will not be as cold. To run R134 with the same level of cool air produced by R12, an updated compressor will need to be installed.