Keeping your A/C in check, hybrid engines, and more!
WCCO's Car Care
Keeping your A/C in check, hybrid engines, and more! WCCO's Car Care · Jul 11, 2026
Keeping your A/C in check, hybrid engines, and more!

Annotations will appear as you listen

0:00
26:52
Keeping your A/C in check, hybrid engines, and more!
Term

air conditioning

Car A/C doesn’t just cool the air—it also removes humidity. That water usually drips out under the car, so a little puddle or drip can be normal.

Term

drain

The A/C drain is the path that carries condensed water out of the cabin area and onto the ground. If the drain is blocked, water can overflow and leak into the passenger compartment instead of dripping outside.

Term

HVAC system

HVAC is the car’s heating and cooling system (plus the fan/airflow). If parts of it get clogged, water can back up and end up on the passenger floor.

Term

passenger floor

If the passenger floor is wet, it often means water from the A/C system isn’t draining correctly. Leaving it wet can lead to mold, so it should be checked.

Term

mold

Mold is what can grow when the inside of the car stays wet. If the floor stays damp, it can become a health and odor problem.

Term

cabin air filter

Your cabin air filter helps keep the air inside the car clean by filtering what comes through the vents. If it gets clogged, less air can move through, so the A/C or heater won’t feel as strong.

Term

refrigerant recharge

Refrigerant is the substance that makes your A/C actually cool. If it leaks out over time, the system can’t cool properly, so a shop may need to add the right amount back.

Term

or-ring

An O-ring is a small rubber seal that helps stop leaks. If it wears out, refrigerant can escape and your A/C won’t work right.

Term

evacuate the system

Before refilling an A/C, a technician pulls out the old refrigerant and any unwanted air/moisture. That way the system can be charged correctly and work the way it should.

Term

tracer dye

Tracer dye is a special additive that helps find where the A/C refrigerant is leaking. After the system runs, the dye shows the leak location so it can be fixed.

Term

sealant

Some A/C “recharge cans” include sealant, which is supposed to plug leaks. But if it doesn’t work as intended, it can block the A/C passages. That can make the air conditioner perform worse and cost more to fix.

Term

undercharge

Undercharging means there isn’t enough refrigerant in the A/C system. When that happens, the air conditioner may not cool properly, and it can strain parts of the system. Again, it’s about getting the correct amount.

Term

overcharge

Overcharging means you put in more refrigerant than the system is designed for. That can make the A/C act weird and not cool well, and it can even lead to bigger issues. The system needs the correct amount, not just “a can.”

Concept

weighing it and refilling it with the proper amount

Instead of using a one-size-fits-all can, a proper A/C repair measures how much refrigerant the system actually needs. That helps the A/C work correctly and prevents adding too much or too little. It’s the more reliable way to recharge.

Term

evaporator

The evaporator is the part inside the car that cools the air. Refrigerant passes through it and absorbs heat from the cabin. If flow is blocked, the A/C can’t cool as well.

Term

condenser

The A/C condenser is the heat-exchanger that releases heat from the refrigerant to the outside air. The refrigerant flows through it, and if passages get restricted, the system can’t reject heat effectively. That leads to weak cooling.

Term

wheel bearings repacked

Wheel bearings help the wheel spin smoothly. “Repacking” them means taking them apart and putting in fresh grease so they keep working well instead of running dry or contaminated.

Term

sealed assembly wheel bearing

Some wheel bearings are built as sealed units, like a little grease-filled cartridge. Since they’re sealed, you typically don’t take them apart to add grease during normal maintenance.

Term

bearing grease

Bearing grease is the lubricant inside the wheel bearing. Fresh grease helps the bearing spin smoothly and protects it from wearing out too fast.

Term

preload

Preload is how “tight” the bearing is set when you put it back together. Getting it right helps the wheel spin smoothly and prevents extra wear.

Term

shake down

A “shake down” here means the mechanic checks the car for looseness by inspecting and moving key parts. It helps find problems early, like worn wheel bearings.

Term

steering and suspension components

These are the parts that help the car steer and keep the wheels planted on the road. If something is loose or worn, the car can feel shaky or noisy, and the mechanic will check for that.

Term

free play

Free play means there’s extra looseness you can feel or measure. If wheel bearings have too much free play, they’re likely worn and may need attention.

Term

service interval

A service interval is how often you’re supposed to do certain maintenance. For older cars, the schedule can change based on how much you drive and how you store it.

Concept

letting that exhaust breathe

The host is basically saying that if a car sits too long, the exhaust area can get stale or damp. Taking it out now and then helps keep things from getting worse while it’s parked.

Term

hybrid engine

A hybrid uses two ways to move the car: a gas engine and an electric motor. The car decides when to use the battery and when to use gas to keep performance and efficiency balanced.

Term

regenerative braking

When you slow down, the car can use the motion to make electricity instead of just using the brakes to create heat. That electricity helps recharge the battery.

Concept

drive cycles

Drive cycles are just how you drive day to day—stop-and-go versus highway cruising. Your hybrid’s computer reacts to that and chooses when to use gas or electricity.

Term

plug-in hybrid

A plug-in hybrid is a hybrid you can charge by plugging it in. That lets it run on electricity for the first part of your trip, then it uses gas more later.

2016 Ford Edge
Car

2016 Ford Edge

The Ford Edge is a popular family crossover. At around 100,000 miles, people often debate how to service the transmission fluid—either a simple drain-and-fill or a more aggressive flush.

Term

transmission flush

A transmission flush is when the shop tries to replace more of the old transmission fluid than just draining the pan. The goal is to get fresher fluid throughout the transmission.

Term

powertrain fluids

Powertrain fluids are the fluids that help the car’s drivetrain parts work smoothly. In this case, the discussion quickly narrows to transmission fluid service.

Jeep Wrangler
Car

Jeep Wrangler

A Jeep Wrangler is a type of SUV that’s built for off-road driving. The coolant overflow container is part of the cooling system that holds extra coolant when the engine gets hot. If it’s discussed on a 2018 Wrangler, it’s usually because it helps keep the engine from running too hot.

Term

coolant overflow container

The coolant overflow container (also called the expansion tank) stores extra coolant as the engine heats up and expands. When the system cools down, it pulls coolant back in to maintain proper coolant level and pressure.

2018 Jeep Wrangler JL 3.6
Car

2018 Jeep Wrangler JL 3.6

This is a 2018 Jeep Wrangler (JL generation) with a 3.6-liter V6 engine. The question is about the cooling system—specifically the coolant overflow container—and why coolant might not drain normally when you open the radiator.

Term

radiator cap

The radiator cap controls the cooling system’s pressure and provides the sealed opening used for draining and refilling. If the cap is opened incorrectly or while the system is pressurized, you can get confusing results—like coolant not draining as expected.

Term

vacuum

In a cooling system, a “vacuum” can form when coolant is drained or when caps/valves are opened in a way that traps air. That vacuum can prevent coolant from flowing out until air can enter through the correct openings.

Term

bleeding it out

“Bleeding it out” is the process of removing trapped air from the cooling system after draining/refilling. Air pockets reduce coolant circulation, which can lead to poor cabin heat and uneven engine cooling.

Term

air pocket

An “air pocket” is a trapped bubble of air inside the cooling system that disrupts coolant flow. The host explains that it can create a blockage, preventing coolant from reaching parts of the system.

Term

bleed all the air out of the system

Bleeding means getting trapped air out of the cooling system. If air is trapped, coolant can’t circulate well, and the car may not cool properly.

Term

check valve

A check valve is like a one-way door for fluid. It helps keep coolant moving the right way, and it can be involved in procedures to get air out.

Term

electronic key

An electronic key is the wireless fob you use to lock/unlock the car and open the trunk. If it fails, it might just need a battery—or it might need repair or reprogramming.

2017 Honda Accord
Car

2017 Honda Accord

This is a 2017 Honda Accord, and the caller’s issue is with the electronic key/key fob. The discussion is about whether a dealer replacement price is reasonable and what you can try before replacing the whole fob.

Term

key fobs

Key fobs are the handheld transmitters used for keyless entry. They can fail due to battery depletion, water intrusion, corrosion, or internal electronic wear, and replacement costs often include programming to match the vehicle’s security system.

Term

programming and initializing

Programming is what makes the new key fob work with your specific car. The car has security rules, so it has to be set up to recognize the new fob.

Term

security process

The security process is the car’s anti-theft system that checks whether a key is allowed. That’s why replacement keys often need special setup to work.

Term

aftermarket ones

Aftermarket key fobs are cheaper third-party replacements. They might work, but quality and compatibility can be hit-or-miss, and you may still need setup.

2011 Rogue
Car

2011 Rogue

A 2011 Rogue is a Nissan SUV. The caller says it made a whistling sound while driving and then the car would quit when they pressed the brake at a stoplight, then start again later.

Term

oil changed

An oil change is when the shop replaces the engine oil. It keeps the engine lubricated, and in this call it’s mentioned because it happened around the same time as the problem.

Term

tires rotated and balanced

Tire rotation moves tires to different positions on the vehicle to promote even tread wear. Tire balancing ensures the wheel/tire assembly spins smoothly by correcting weight imbalances—both are common service items the caller had done before the symptom appeared.

Term

whistling noise

A whistling sound usually points to air moving where it shouldn’t or air flowing through a restriction. The important part is noticing when it happens (speed, temperature, driving situation) so the mechanic can find the cause faster.

Term

air intake

The air intake is how the car pulls air in to feed the engine. If something blocks it or lets air leak in the wrong way, the car can make strange noises and may run differently.

Term

diagnostic charge

A diagnostic charge is what you pay when the mechanic spends time testing to figure out what’s wrong. The caller is asking whether that fee gets credited if you later do the repair.

Term

scan tool

A scan tool is a device a mechanic plugs into your car to see what the computer is reporting. It can show error codes and real-time sensor readings so they can diagnose the problem instead of guessing.

Term

trouble codes

Trouble codes are standardized diagnostic messages stored by the vehicle’s computer when it detects a fault. They help technicians narrow down the system (engine, emissions, hybrid systems, etc.) and then confirm the cause with additional tests.

Term

voltages

Voltages are electrical measurements that can indicate whether sensors, actuators, and wiring are operating within expected ranges. Diagnostic scan data often includes voltage readings to confirm power/ground and signal integrity.

Term

temperatures

Temperatures in scan data are sensor readings used to verify thermal conditions like coolant or intake temperatures. If a temperature sensor is wrong—or if a system isn’t reaching expected temps—it can point to the underlying fault.

Term

pressures

Pressures are measured quantities from sensors (like fuel, boost, or HVAC-related pressures) that indicate whether a system is operating correctly. Diagnostic readings of pressure help confirm whether the fault is mechanical, electrical, or control-related.

Concept

throwing parts at it

"Throwing parts at it" is a troubleshooting approach where a shop replaces components without confirming the root cause. It often wastes money because multiple parts can cause similar symptoms, and the real failure may be elsewhere.

0:00
26:52