Seattle may not be the hottest city in the country, but when summer temperatures climb and the sun beats down, you expect your vehicle’s air conditioning to keep things cool and comfortable. If your AC stops working properly during a heatwave or road trip, driving can become uncomfortable—or even dangerous.
At High Road Automotive, we help drivers in Seattle stay comfortable behind the wheel with expert auto AC diagnostics and repairs. In this blog, we’ll go over the most common air conditioning problems, what causes them, and what you can do to keep your AC system performing its best all summer long.
Common Car AC Problems in Hot Weather
1. Weak Airflow
If the air from your vents is weak or not blowing as forcefully as usual, it might be due to:
- A clogged cabin air filter
- A failing blower motor
- Blocked or damaged air ducts
2. Warm Air from Vents
When the AC blows warm air instead of cold, it’s usually caused by:
- Low refrigerant (often due to a leak)
- A broken or failing compressor
- Electrical issues or a faulty AC clutch
- A clogged expansion valve or orifice tube
3. AC Cycles On and Off Rapidly
This could be a sign of:
- An overcharged or undercharged system
- Faulty pressure switches
- A dirty condenser coil
4. Strange Smells
If the air smells musty or sour, you could have:
- Mold or mildew in the evaporator core
- A clogged drain tube, allowing moisture buildup
- A dirty cabin filter full of dust and bacteria
How to Maintain Your Car’s AC System
Replace the Cabin Air Filter
This is a simple and affordable maintenance item that can improve airflow and air quality. Most manufacturers recommend changing it every 12,000–15,000 miles.
Run the AC Regularly
Even in cooler months, turn on the AC for a few minutes each week. This keeps the seals lubricated and prevents refrigerant leaks.
Check for Leaks and Low Refrigerant
Have a professional inspect your AC system for refrigerant leaks or low levels. Refrigerant doesn’t get used up—it only decreases if there’s a leak.
Keep the Condenser Clean
Dirt, bugs, or leaves on the front condenser (similar to a radiator) can block airflow and reduce cooling efficiency
Frequently Asked Questions About Auto AC Repair
Q: Why is my AC not blowing cold air anymore?
A: The most common reason is low refrigerant, but it could also be a failed compressor or electrical issue. A full AC diagnostic can pinpoint the cause.
Q: Can I drive with a broken air conditioner?
A: Yes, but it can be uncomfortable and may indicate other system problems. If there’s a leak or compressor issue, it should be addressed soon.
Q: How much does it cost to recharge an AC system?
A: Prices vary, but at High Road Automotive, we offer fair pricing and honest assessments. We also test for leaks before recharging to ensure long-term results.
Q: Can I fix AC problems myself?
A: Some maintenance, like replacing the cabin filter, is DIY-friendly. But diagnosing refrigerant leaks or replacing AC components should be handled by trained professionals with the right tools.
Stay Comfortable with Help from High Road Automotive
Seattle summers may be short, but they can still be hot—and you deserve to drive in comfort. Whether your air conditioning just needs a recharge or something more serious like compressor repair, High Road Automotive in Seattle, WA has the experience, tools, and trusted technicians to get the job done right.
Call or schedule an appointment today to keep your car’s AC system cool, clean, and reliable all summer long.