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Cooling System

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Symptoms of a Bad or Failing Radiator Hose
Common signs include leaking coolant, engine overheating, the Low Coolant Light coming on, and radiator hose damage or collapse.
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...
Symptoms of a Bad or Failing Water Pump (Auxiliary)
Common signs include no warm air or fluctuating heat coming from the heater, the window defroster not working, and high pitched buzzing sounds.
How Long Does a Coolant Reservoir Last?
The coolant reservoir is a tank located in your vehicle that holds the overflowing coolant that comes from your cooling system. The reservoir is a clear plastic container located near the radiator....
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...
Symptoms of a Bad or Failing Water Pump
Common signs include coolant leaks at the front-center of the car, loose water pump pulley, overheating engine, and steam coming from the radiator.
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 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
Failing fan clutch symptoms
What you described is happening is normal cooling fan clutch operation. When you first start the engine the cooling fan clutch will be in the full engaged position and may take a minute for the internal fluid to move back...
Question
Why are the fans staying on when the car is off to where I have to pull the fuse?
The fans are controlled by a relay as well as a temperature switch and possibly timer(s). The relay may be stuck in the closed position and that would be the first and easiest component to test. If a relay tests...
Question
Blown head gasket
A blown head gasket that is blown between a coolant passage and the combustion chamber can cause combustion gases to be pushed into the cooling system. This pressure will show up as air bubbles and overheating of the engine. It...
Question
Over Heating
I would test for exhaust gas in the coolant which, if present, would mean that there is a head gas leak. If the coolant level is falling slowly over time, that suggests a leak as well and a pressure test...
Question
Leaking antifreeze
The leaking coolant sounds like it is coming from the water pump in the front of the motor. With this much coolant leaking I would recommend not driving the vehicle until it is fixed. This engine is very prone to...
Question
Engine wont reach operating temperature
The first thing to check is to see if the cooling fan clutch is working properly. Start the engine when it is cold and rev the engine up to 1500 rpm and listen to the cooling fan to see if...
Question
Coolant seems to disappear
If this "just started", it may be that there was trapped air in the system, since you did the water pump replacement, and so all you are doing is providing make up coolant at the moment. But, if the coolant...
Question
Exactly where is my thermostat located?
If you follow the lower radiator hose up toward the engine, that lower hose terminates at the thermostat housing. The housing itself is attached to the engine with three relatively small bolts. If you remove those three bolts and the...
Question
A lot of parts been changed do to the antifreeze still leaking oil looks good no smoke from tailpipe don't see the leakage
Hello, to test a coolant system requires a pressure tester. This tester helps to locate leaks without operating the vehicle. It would be best to have a certified mechanic look at the vehicle and determine exactly what is going on....
Question
heat stopped working, only blowing cold air. checked and replaced fuses but no change
Two common causes of no heat, as you describe the circumstances, are a fault with the heater control valve and/or a problem with the blend door in the under dash ventilation system being stuck in position or inoperable. There are...
Question
Looks like antifreeze is old but heater blows warm air to be confortable but not hot could it be caused by old antifreeze
The heater core may be partly clogged from debris. Have the engine checked to make sure the engine is at operating temperature. If engine is not hot enough then replace thermostat, flush heater core by disconnecting coolant lines and running...
Question
Second Opinion
You should get a complete cost break down in writing. The price may not be just for the water pump and have additional repairs like thermostat and hoses or flushing of the system. make sure you get all work in...
Question
How do I know if it is the Water Pump or thermostat that needs replacing?
In your question, you have not stated the "fault" you are experiencing, consequently I will assume it is overheating. If not, please write back in with clarification so that we can best assist you. There are a myriad of causes...
Question
Engine coolant disappeared
The engine could have an internal coolant leak and the coolant is being consumed into the motor. This is is you do not see any leaks anywhere on the round or on the engine. I would recommend having a mechanic...
Question
Engine overheats to limit
The first thing to check why the engine is overheating is to make sure the cooling system is full. Then have a mechanic like one from YourMechanic pressure test the entire cooling system to see if there are any leaks...
Question
My car overheats in about a mile of driving
If you are coming up low on coolant every time, it has to be going somewhere. It could be leaking out of a hose or radiator, but to lose it that quickly, I expect you would be able to see...
Question
Heat issues
The first thing to check why it runs hotter at idle is to see if the coolant is full and there are no leaks. You may need to have a cooling system pressure test if system is low on coolant...
Question
Engine Coolant
It is a good idea to know when your last service was done. If you want to have your coolant checked to make sure it is good or needs changed. I would recommend having a mechanic like one from YourMechanic...
Question
I have air pockets in my cooling system how do I get them out
The cooling system does not need any special procedures to get the air out of the system except to have the heater to on and warm setting. This will allow the coolant to flow through the heater core and out...
Question
Over heating problems
Based on what you are describing, typically a Mechanic would look for a faulty water pump, faulty radiator cap, plugged up, or externally obstructed, radiator, and/or non functioning electric cooling fans. However, your description of erratic operation of the temperature...

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