HVAC systems in diesel trucks aren't only responsible for maintaining a comfortable temperature and air quality inside the cabin—they also help regulate humidity levels, which can affect the longevity of components in the cabin, help defrost and dehumidify the windshield and windows, and provide fre
HVAC Systems Explained
Although the letters in HVAC work in conjunction, the system is split into several components: the heater core, blower motor, evaporator, compressor, condenser, expansion valve, and accumulator.
When it's a cold day and the heater is turned on, hot coolant from the engine flows through the heater core, which acts like a small radiator. The blower motor then blows air over the heater core, essentially pushing hot air into the cabin through the vents. On cold days, the air conditioning system takes over: it compresses and expands a refrigerant gas to cool the air, then circulates it through the trucks' vents.
HVAC Systems: Problems and Symptoms
Keeping tabs on your truck's HVAC system will help you avoid a displeased driver. For example, in the winter, you don't want a malfunctioning heating system in your diesel truck–your driver will not be comfortable, and they may even catch a cold. If you ever notice cold air blowing out of the vents when you turn up the heat, strange noises coming from near the engine, or a burning smell, your blower motor may be in poor condition, or the air filter may be clogged.
On the other end, if the HVAC system on your truck isn't working properly in the summer or on hot days, come and bring it into the shop. You may have a refrigerant leak, clogged filters, a malfunctioning compressor, and/or a damaged condenser or evaporator coil.
Better yet, we recommend you have your HVAC system checked and cleaned regularly by a qualified technician. Our technicians at Duran & Sons Diesel will do all the work for you—we'll check the coolant levels, thermostat, heater core, and other components for signs of wear or damage.
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