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Cooling System

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P0494 OBD-II Trouble Code: Fan Speed Low
Diagnostic Trouble Code (DTC): P0494 P0494 code definition If the PCM has detected a voltage reading that is too low from the electric cooling fan control circuit, the P0494 code will...
How To Keep Your Car From Overheating
Monitoring your coolant level, turning the A/C off in very hot weather, and regular inspections will help you avoid having an overheating car.
How to Quickly Cool Down a Hot Car
Knowing how to cool off a hot car that has been sitting in the heat and sun can save you the discomfort of having to sit in...
How Long Does a Cooling Fan Relay Last?
The purpose of the cooling fan relay is to pull air through the A/C condenser and the radiator. Most vehicles have two fans, one for the radiator and one for the...
How Long Does a Cooling Fan Resistor Last?
The purpose of the cooling fan resistor is to remove heat from the engine’s coolant and from the A/C refrigerant. The resistor does this by drawing air through the radiator and...
How Long Does a Coolant Reservoir Last?
The coolant reservoir is a tank located in your vehicle that holds the overflowing coolant that...
How Long Does a Connector Hose Heater Control Valve Last?
The hose heater control valve opens and allows hot coolant from the engine to blow into the heater core. After the vehicle gets to the correct temperature, the thermostat...
How Long Does a Coolant Recovery Reservoir Last?
The coolant recovery reservoir is both an expansion tank as well as a coolant recovery tank. In modern vehicles, the radiator has no cap so it has no upper tank for...
How Long Does a Coolant Tube Last?
The coolant tube, or hose, carries coolant to and from the engine in your vehicle. First, the coolant tube removes the hot coolant from the engine and brings it to the radiator...
P0495 OBD-II Trouble Code: Fan Speed High
Diagnostic Trouble Code (DTC): P0495 P0495 code definition The P0495 code is stored when the PCM has detected a voltage reading that is too high from the electric cooling fan control...
How to Replace a Cooling Fan Resistor
The cooling fan may not work at all speeds if the resistor is broken. If the engine overheats or the fan never turns off, the resistor may be faulty.
How Do I Prepare My Car for Summer?
Summer's heat, dust, and stop-and-go traffic will take their tolls on your vehicle. Follow these tips to ensure optimum wellness of your car: Air Conditioning: Have your air...
How to Replace a Car Surge Tank Hose
Replacing a surge tank hose involves working on the coolant system, which can burn you when the engine is hot. Stay safe by waiting for it to cool.
How to Flush Your Cooling System
Flushing the cooling system is part of every vehicle's scheduled maintenance. This procedure is usually required every two to four years, depending on the vehicle. It is important...
How to Calculate the Concentration of Coolant in a Car
A car cooling system works to transfer heat from the engine. Check antifreeze level and condition, and mix coolant with water to prevent overheating.
Why Cooling System Repairs on a European Car Can Be Tricky
Repairing a cooling system, such as if there is a leak, can pose different obstacles. Many repairs may involve finding the radiator of the system.
How to Replace a Cooling Fan Relay on Most Vehicles
Cooling fan relays fail when the radiator cooling fan no longer receives an electrical signal. A broken fan relay means the radiator cannot cool down.
How to Remove and Replace a Heater Control Valve
The heater valve is integral to a vehicle’s cooling system. Replacing one requires a new valve, some basic tools, and fresh coolant.
How to Replace a Car Air Conditioning (AC) Compressor
If the AC compressor fails, it can cause the air conditioning system not to work. This article covers how to locate, remove, and install a compressor.
How to Replace a Condenser Fan Relay
A condenser fan relay operates the fan that removes heat from the engine. If faulty, it will not allow the A/C to blow cool air or function at all.

Related questions

Question
Honda prelude 1996
You're probably right about the cooling system. There may be a slow leak that evaporates as it leaks, so you don't see any puddles. You need to have the cooling system pressure tested to locate the leak. The shaking is...
Question
I have a 2005 Impala keeps overheating and air blows thru vents when the switch is off
It could be that there is a problem in the radiator. They are subject to buildup of minerals that lower their cooling capacity. One way to check if there might be a problem with the radiator is to turn the...
Question
Where is the water pump control relay located on 06 bmw 325i
The water pump control module is mounted in the left rear of the engine compartment. The system does not have a relay but a control module.
Question
My car temperature drops as i drive and heats up when i'm stopped
It sounds like your car needs a new thermostat. The thermostat is a valve that blocks the circulation of the coolant until it reaches a certain temperature. Then it opens just enough to regulate the engine temperature. Thermostat replacement usually...
Question
2001 Land Rover Discovery , 162 000km. Periodically loosing coolant + overheating. What are the possible repairs?
If the pressure test did not show any leaks then you should inspect reservoir for any cracks and replace pressure cap. Then clean area of any residue coolant and drive a few days and recheck for any leaks in the...
Question
I have a Fiat 500 sport I went to check the oil in the water and the water was a dark brown what would cause that
If you did not see any problems with the oil except it was low then I would suggest having oil and filter replaced. The coolant color would need to be checked to see if there is a problem since some...
Question
Transmission hot idle engine , plus there is trans fluid leaking i think its coming from tbe filler but also have coolant leak
The transmission requires the cooling system to be working correctly to keep it cool. If you have the cooling system pressure tested and locate the coolant leak and get it repaired. You may have a water pump leaking. Once the...
Question
Q: Did I pay to much?
If what you describe is all you had done then I would have to say it may have been on the high side of pricing for parts and labor. I would however need to see the work order to know...
Question
2005 chrysler 300C code 0480
The most common cause for getting code P0480 on this car is the cooling fan has a problem and should be checked for proper operation and replace electrical cooling fan and fan relay as needed.
Question
Engine light came on, diagnosis at auto zone indicated bad sensor.. Today, my car started overheating.
It sounds as though you have a coolant leak. It may be a small one and it could be that you didn't get it topped off correctly. Pouring coolant into the overflow tank doesn't necessarily do the trick. You have...
Question
Car won’t start. It had problems overheating at first. Then something popped and water came out. I don’t know what’s wrong with it
This sounds like you started off with the coolant getting low due to a leak and then it got worse when overheated and blew the head gasket causing the misfire and no starting from coolant getting inside cylinders. You will...
Question
Put about a cup of engine oil in radiator. What do I do
Don't leave it in there! the oil will deteriorate your rubber hoses and maybe the water pump seal. What you need is a good cooling system flush. It involves taking out the thermostat and running a flush solvent through the...
Question
Infinity G35 overheating after radiator replaced
It could be that you didn't get all of the air out of the cooling system. Sometimes that can involve extreme measures like taking off a heater hose or a pre-heater heater hose to let the air escape while filling...
Question
Should i change my cooler water each year ?
If it's the engine coolant that you are asking about, every other year should be quite sufficient. When you decide to have that done contact Your Mechanic. They can send a technician to your home or office to replace your...
Question
My engine heats up very quickly and steam/heat comes out from under the hood. I think it might be a heater core hose leak.
If you think you have a coolant leak, you need to stop driving the car. Running the car while it is low on coolant can do some pretty serious engine damage in fairly short order. You can have this thing...
Question
Thermostat gasket is leaking from last repair. Is there a warranty/ "good faith" policy considering it has been only 90 days
If you suspect that the repairs did not fix the leak then you will need to contact customer service and set up another appointment to have the leak checked and if it was caused by last repair they will take...
Question
temp thermal sensor why does it keep goi
You should have the fan motor checked to see if it is drawing too much power causing the sensor to fail. You need to have computer scanned for codes and system checked to see if the fan motor turns on...
Question
Heater not working on 2012 ram turbo diesel 3500 when I turn truck off water leaks all over but coolant is all there
That sounds like a water pump leaking. In many cases the water pump seal can leak while the truck is parked, but not while it is running. In other cases it may leak when the engine is cold, but not...
Question
Coolant leak on 2005 Audi A4 2.0L petrol but no engine overheating
You will need to have the cooling system pressure tested to locate the leak. You may have a water pump leaking or a hose that is leaking.
Question
How much will it cost to have a shop replace the freeze plugs in between the trans and engine block on my 2002 dodge ram 1500 4.7L
The labor to just remove and install the transmission is 4.5 hours and then add one hours labor to do the one freeze plug on back of motor and an additional 1/2 hour for each additional freeze plug. You may...

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