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Showing posts with the label Car airconditioning

Mildew Odor Comes Out the AC Vents

The air that comes out the air conditioning vents has mildew odor.

1998 Blazer AC is Blowing Hot Air

We received a lot of email query about a 1998 blazer hot air blowing air conditioning system, so instead of answering the email one by one we decided to discuss the problem.

Troubleshooting 1998 blazer hot air blowing AC
If the problem is suddenly occur this indicates a major refrigerant leak. The refrigerant for car air conditioning is a major component of the system that serves as the life blood of the system. It is the one that carries heat coming from the passenger compartment and dump the heat outside the car to make the passenger compartment cooler.

Diagnose and Repair Car Air conditioning System

Principles of air cooling of AC system
The principle that is applied to the automotive air conditioning system is that when liquid turns into a vapor it will absorb heat so that the surrounding area cools down. It is similar to the principle that when a body is wet and the perspiration is exposed to the wind the body will feel cool.

Refrigerant flow
The illustration is shows basic structure of the air conditioning system of an automobile. The cycle is that the refrigerant changes state from liquid state to vapor state and back to the liquid state again. The liquid becomes gas when the refrigerant absorbed heat and the surrounding becomes cool, then the gas is compressed making the refrigerant temperature to rise, now as the gas cools down it will return to liquid state.

Car AC Blows Air with mildew Odor

Conditions when car trouble occurs
When the car air conditioning is turned on, the air that comes out the air con vents is with mildew odor.

Possible cause of car trouble
Drain pan of AC unit is not draining

Car problem troubleshooting
Car air conditioning has a component called the evaporator, when the air conditioning is turned on the evaporator gets very cold then if the air is blown through the evaporator the air will turn out to be cold after it passes the many fins of the evaporator and going out the air conditioning vents. Now, during hot and humid days a condensation is formed on the evaporator because the evaporator is cold. The moisture that is formed will drip down into the drain pan of the evaporator unit and then it is funneled down a hose going out the road.

My Car AC is Blowing Hot Air

Car ac is blowing hot air suddenly or is blowing hot air slowly overtime. Cold air is usually coming out the ac vent when the ac switch is turned ON, however after turning the ac switch ON, the ac vents is blowing hot air.

Do it yourself

How to Install a Car Battery
While engine is running, use the meter to check the alternator and voltage regulator output. This is very important because a faulty alternator or voltage regulator can cause a premature battery failure and you do not want this to happen.

How to Check Tyre Pressure
The tyre thread life could reduce if the tyre pressure of your car is under what the car manufacturer specified on your car owner’s manual.

How to Change a Flat Tire
When you encounter a flat tire while you drive your car the first thing to do is to pull off the road away the traffic as possible.

How to Recharge a Car Battery
Before attempting to recharge car battery always make sure that the battery is at room temperature (60 °F to 80°F). Also, when it is extremely cold remove the battery from the car and bring it indoors to allow the battery to become warm before begin the charging.

How to Disconnect a Car Battery
Do you know how to disconnect a car battery? Suppose you want to clean or replac…