Even though you’re not blasting the heat during summer, your car’s heating system still needs attention—especially if you want it ready when the cold returns. Many drivers forget about their heater once warmer weather hits, but neglecting it during the summer can lead to problems that show up at the worst possible time: like the first chilly morning in fall or winter.
Here’s why your heating system matters year-round and how to keep it in working order during the hot months.
1. Understand How the Heating System Works
Your car’s heater doesn’t run on a separate unit—it’s actually tied into the engine’s cooling system. When your engine warms up, coolant flows through the heater core, which acts like a small radiator. A fan then blows air over the hot core and into the cabin.
That means if there’s a problem with your coolant, thermostat, heater core, or fan system, it can affect both engine cooling and interior heat.
2. Run the Heat Occasionally
Even in summer, it’s smart to turn the heat on now and then.
- Why? It keeps the heater core, fan, and blend doors working smoothly.
- Let it run for a few minutes every couple of weeks to prevent dust buildup, sticking components, or weird smells from collecting in the system.
3. Keep an Eye on Coolant Levels
Since your heating system relies on engine coolant, low coolant levels can affect both temperature control and engine performance.
- Check your coolant reservoir regularly.
- Look for signs of leaks under the car or a rising engine temperature gauge.
- If the coolant looks rusty or dirty, it might be time for a flush.
4. Inspect the Heater Core and Hoses
The heater core and its hoses can get clogged or start leaking over time. These parts are often overlooked during warm months but are key to your heater working properly when you need it.
- If you notice a sweet smell, foggy windows, or damp carpet, it could point to a leaking heater core.
- A professional inspection can catch these issues before they cause bigger problems.
5. Monitor Your Blower Motor and Controls
Your heater’s fan and control panel should be working even if you’re just using the AC. If the blower only works on certain settings or not at all, it may need servicing.
- Test your vents on both hot and cold settings.
- Make sure the fan responds at every speed and air flows properly from the dashboard, floor, and defrost vents.
Final Thoughts
Just because it’s hot outside doesn’t mean you can forget about your car’s heating system. Summer is actually the perfect time to check in on it, run a quick test, and make sure everything is in working order before you really need it. Keeping your heating system in good shape also helps your engine’s cooling system stay healthy. If you’re unsure about your coolant, heater core, or fan operation, schedule a quick inspection—it’s an easy step that pays off when the temperatures drop.
