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Heating AC and Engine Cooling

Heating, air conditioning (AC) and engine cooling require a radiator to transfer heat. Heating a cabin requires heat to be transferred from an engine block. Engine cooling blows the heat out of the engine. AC uses refrigerants to cool air.

2,065 Questions

What the reasons for cooling fan blades all destroy?

Cooling fan blades can become damaged or destroyed due to several factors, including physical impacts, overheating from prolonged use, and the accumulation of dust or debris that disrupts airflow. Poor manufacturing quality or material fatigue can also lead to failure over time. Additionally, improper installation or misalignment can cause excessive vibration, further contributing to blade damage. Regular maintenance and inspections can help mitigate these issues.

Why does radiator light go on when car is cold but only stays on for 2 minutes?

the light is triggered by a switch inside the overflow bottle, If the coolant level is low when the engine is cold, it will trigger the switch to turn on the light until the cooant warms up and expands. The hot water expands and flows through the radiator cap and into the overflow bottle and shuts the light off. Then once the engine is shut off and cools down, the coolant will flow back into the engine again and empty the overflow bottle. so if the light is on, you need to fill the overflow bottle to the "cold" mark.

Would a radiator cap cause a car to overheat?

to add to this, a big YES,on the radiator cap .the radiator cap needs to be specific pressure rating. radiator caps do wear out. also the cheapest fix to start

It is doubtful a radiator cap would cause a car to overheat. Common overheating causes are insufficient coolant, leaking coolant (into or out of your engine), faulty thermostat, blown cooling fan fuse, faulty fan temperature switch ( sender ), faulty fan, or a faulty fan relay.

Why do cooling systems need reverse flushing?

Suggested every two years. The reason being is simple; like in a stream in the woods, the segments or containments settle in one direction. by pumping water in opposite of normal direction, with a garden hose and radiator hoses off. The segments and contaminants are freed up by opposition to normal flow over the years.

What can cause a vehicle to overheat?

A vehicle can overheat because of a coolant leak, a malfunctioning cooling fan, a blockage in the coolant flow, a rapid loss of engine oil or a failed oil pump.

1) Coolant leaks can occur in the radiator, heater core, or any of the coolant lines. Water pumps can develop leaks particularly if not installed correctly. Coolant leaks can also come from a blown head gasket or, if your vehicle has coolant in the intake manifold from it's gasket.

2) A electric cooling fan will stop working if it's motor is bad, if the temp sender that turns it on and off goes bad, if the cooling fan relay goes bad, or if there is a problem with it's wiring. A clutch fan can go bad if its clutch fails to work. This isn't usually too bad as the fan will still spin just not at the correct speed. A normal old school fan will always work unless the thing breaks off.

3) Blockage in coolant flow occur when a water pump fails, a thermostat fails in the closed position, or a crud blockage develops in your heater core or radiator. Hoses can also develop a blockage but it is less common.

4) Rapid engine oil loss can occur when leaks develop because of a cracked head, blown head gasket, a leak in a oil cooler or oil cooler line ( if applicable), a cracked block or severe damage to the oil pan while driving (watch those things lying in the road). Heat causing friction will develop quickly in your motor.

5) If a oil pump fails (mechanical or electric) it will cause oil to stay in the pan and the friction of pistons and cam(s) and the crank will, as above, cause overheating and costly repairs.

What would cause radiator fan to constantly click on and off?

on most vehicles the radiator fan is wired up to a relay so that the fan will remain off until the car is warmed up. they do this so your car will warm up to NOT (normal operating temperture) faster. if you are good with wiring you could wire the fan up to a switch so you can turn it on or off when needed.

Could leaky vale covers cause bad head gasket signs?

If the valve cover is leaking it may let oil flow down the head and make the Head gasket appear to be leaking. Clean the engine and then use oil dye or watch for leaks. If there is a coolant leak it is not the valve cover.

Does running the ac helps cool down the engine?

No, Air conditioning actually makes the car's engine work harder causing to heat up more. To get a demonstration of the process, put your hand over the top of your outside air conditioner when it is running. Air conditioning is a heat movement. It's moving heat from inside your car to the outside. This heat is removed right in front of the radiator, so your csr runs hotter.

How much Refrigerant does a Van with duel air hold 2001 Ford?

If you are asking about a Ford Windstar it is 56oz total capacity. You can find this and more information on the link below. Just tab onto the Locate my car's low side port icon on the website and follow the instructions. It can also tell you the amount and type of lubricant you will need.

Where is the electric auxiliary fan relay or switches located on a 1992 Mercedes 400e?

relay is in fuse box, near break booster, fan switch is in left front of the intake, blue sensor has two pin.

Can a bad thermostat cause you to rapidly loose antifreeze?

Yes, because as the water heats it expands. The water system will then spill over to the expansion tank. The expansion tank is only big enough to store expanded water at the thermostat temperature. When your thermostat doesn't open the water will over heat/ over expand. You will see brownish burnt water marks all over the expansion tank near the overflow hole. Best off just throw away your thermostat you don't really need it.

Should a new ac need freon adjustment my unit is 16 mnts old blew hot air last night turned off unit 1 hr later unit cooled when turned on AC repair man says needs a freon adjustment?

Never heard of a freon adjustment. The AC system is a closed system, the refrigerant will not increase the amount it has in it, and the only way you will need to add more is if there is a leak in it. Unlike motor oil it does not need to replaced after so much usage. There could be a few different things that could be wrong with your system. I would first check with your friends and neighbors and find a reliable mechanic who is a little more versed in the AC system then the one you have spoken to already. You could have a blender door that is not opening and closing correctly. Depending on your car this is either an electrical function or one done by vacuum.

What is a indoor fan relay?

An indoor fan relay is an electrical component used in HVAC systems to control the operation of the indoor fan motor. It acts as a switch that opens or closes the circuit, allowing the fan to turn on or off based on signals from the thermostat or other system controls. This relay helps manage airflow and temperature regulation within a space, ensuring efficient heating or cooling. Proper functioning of the relay is essential for maintaining optimal indoor comfort and energy efficiency.

Why want your 2001 town in country take freon when someone make and attempt to put it in because it no longer cool?

It could just be a matter of time to put enough in to start the compressor running. If your compressor is not coming on the two sides have equalized and now the low side line is higher in pressure and the pressure from the can is having to fight the pressure on the line. It could take 30 to 45 minutes to get enough refrigerant in to start the compressor running. Once the compressor is running it will then start taking the refrigerant in faster.

Is it difficult to install airc onditioning in a car?

Sort of. First it takes a lot of disassembly to get to where the cooling element has to go, then the freon is a restricted substance which the average guy isn't supposed to have access to.

How much freon is in a 2002 Chrysler 300?

2002 Chrysler 300 uses 25oz of refrigerant and uses oil type Pag 46. There is a lot help full information about your vehicles ac system on the link below.

Purpose of the indoor fan relay?

indoor fan relay An electric relay that starts and stops an indoor fan on cooling, electric - heating, and heat pump systems

Why the cooling fans stay on when you turn your car on?

unless there is something wrong with your car, the cooling fans are activated when a sensor in the cooling system detects that the coolant is too hot and that is when the fans turn on to help bring airflow to the radiator or just to circulate hot air away from the engine. if the coolant is still hot when your car turns on, then the fan will stay on as well.

Also, if the AC is in the on position both the fans will run.

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