Houston heat pushes your car's A/C and cooling system hard. To avoid a breakdown, keep the coolant full, have hoses, belts, the radiator and fans checked, and get weak A/C diagnosed early. A/C that blows warm usually means a refrigerant leak or a failing part, not just low refrigerant.
Why is Houston heat hard on your car?
Long, hot summers and stop-and-go traffic mean your engine and A/C work hard for months. The cooling system has to get rid of more heat. The A/C compressor runs almost nonstop. Rubber hoses and belts age faster in the heat. Small problems that go unnoticed in spring can turn into breakdowns in July.
Why is my car A/C not blowing cold?
Common causes include:
- Refrigerant leak: A/C is a sealed system. If it is low, it has a leak. Adding refrigerant without fixing the leak is a short-term fix.
- Compressor or clutch problems: The compressor moves refrigerant through the system. If it fails, the A/C blows warm.
- Condenser or fan problems: The condenser sits in front of the radiator. If it is blocked or the cooling fan is not working, the A/C struggles, especially when idling.
- Electrical issues: A bad fuse, relay, sensor or switch can stop the A/C.
- Blend door problems: A stuck door inside the dash can mix in hot air.
Our car A/C repair in Spring, TX starts with finding the cause, so you are not paying for a recharge that will leak out again.
One customer, James Y., shared on Google: "Had a air conditioning failure in my 2019 Chevrolet impala, couldn't figure it out. Took it to this place, they found the issue and fixed it right away. Thanks again."
How can you keep your A/C working well?
- Run the A/C regularly, even in cooler months, to keep the system working
- Replace the cabin air filter so air flows freely through the vents
- Keep leaves and debris away from the front grille and condenser
- Pay attention to new noises, musty smells or water on the floor
How do you keep your engine from overheating?
- Check coolant: Look at the reservoir when the engine is cold. Never open a hot radiator cap.
- Flush on schedule: Old coolant loses its ability to protect. Follow your owner's manual.
- Inspect hoses and belts: Replace any that are cracked, soft, swollen or leaking.
- Check the radiator and fans: Make sure air can flow and the cooling fans turn on.
- Watch the gauge: Know where your temperature needle normally sits.
What should you do if your car starts to overheat?
- Turn off the A/C and turn the heater on full to pull heat from the engine.
- Pull over as soon as it is safe and turn off the engine.
- Do not open the radiator cap or coolant reservoir while the engine is hot.
- Call for help instead of driving on. Driving an overheating engine can cause major damage.
What else should you check in summer?
Heat is also hard on batteries, so have yours tested before it fails. Check tire pressure when the tires are cold. Replace worn wiper blades before summer storms. Keep up with oil and fluid changes too.
When to see a mechanic
- The A/C blows warm or cools only while driving
- The temperature gauge climbs above normal
- You smell coolant (a sweet smell) or see green, orange or pink fluid under the car
- You hear squealing from the belts or a new noise when the A/C is on
For overheating and cooling system repairs, see our engine repair and service page.
A/C blowing warm or the gauge creeping up? R&E Auto Repair is at 930 Rayford Road in Spring, TX. Every vehicle gets a digital inspection with photos and notes sent to your phone, and no work is done until you approve it. If something can wait, we say so. Call 832-585-0229 or contact us to book a visit. We're open Monday through Saturday, 8 AM to 5 PM.