oldskool funk 70,195 views 1:30 How a Cooling Fan Switch/ ThermoSwitch Works - Duration: 3:05. Up next Bad Cooling Fan Diagnosis & Plug Swap "How To" - Duration: 4:26. If this vital point becomes obstructed, the flow ofrefrigerant may be restricted or blocked causing a loss of cooling -- and possible compressor damage as well in systems that rely on Ford cooling fan controllers (late 1980s and early 1990s Mustangs and other models). have a peek at these guys
Now it doesn't. #3 her209, Mar 28, 2009 LTC8K6 Lifer Joined: Mar 10, 2004 Messages: 23,943 Likes Received: 27 Unplug the coolant temperature sensor while the engine is running. If not, you have a fan or relay problem. On this vehicle, you should use a scan tool to see which of these inputs is energizing the fans and when. The fan will then cycle on and off as needed to maintain the coolant temperature. my company
Heater Service Click Here to See More Carley Automotive Technical Articles Need More Information On Automotive Cooling Fans? Both fans should come on when the A/C is on. Replace the relay. Advertisement Autoplay When autoplay is enabled, a suggested video will automatically play next.
This resistor often burns up and fails. The relay is the component that fails most often, so be sure to test the relay as well as its power supply and ground connections. EDIT: Added more troubleshooting steps performed. #1 her209, Mar 28, 2009 Aimster Lifer Joined: Jan 5, 2003 Messages: 16,129 Likes Received: 0 I thought it turned on when the engine What Happens When Your Radiator Fan Stops Working Dual relay.
A belt-driven fan can consume up to 12 or more horsepower depending on engine speed and cooling load. Radiator Fan Not Working Symptoms Extra cooling is not needed when a cold engine is first started, so the fan does not come on until the engine reaches normal operating temperature (195 to 215 degrees). If the fan motor is not at fault, leave the ignition switched on, take the connections off the thermo-switch and briefly touch them together.
In newer vehicles with computerized engine controls, fan operation is often regulated by the powertrain control module (PCM) or a fan control module.
A failed module may also prevent one or both fans from operating, or the compressor clutch from engaging. When Should Radiator Fan Come On Q: Why does a car make a noise when the wheel is turned? The fan also comes on when the A/C is turned on to provide additional airflow through the condenser for good cooling performance. SnagEasy 486,765 views 5:46 How to Wire a Cooling Fan Relay - Duration: 4:00.
An A/C system requires acertain amount of refrigerant to cool properly. A: When a radiator fan belt breaks, the entire car engine can cease to work. How To Check If Radiator Fan Is Working Loading... Radiator Fan Not Working Overheating Most cars (GM for ex) the fan will not come on until the coolant gets to about 210° Farenheit.
immediately the ac went off the temperature rose. More about the author Whatever will fit into the connector to allow you to touch it to a ground. Check a fan motor for faults Fan motor with the thermo-switch lead disconnected and test lead connected to the battery. i bridged the fuse and powered on the ac everything started working. How To Test Radiator Fan Relay
A: Antifreeze and engine coolant are the same product, sold in the same packaging, and both go into the vehicle's radiator. Q: What are the main causes of wobbly steering when driving at low speeds? Low voltage allows the clutch to slip, which creates excessive friction and heat. check my blog BMAC VAGS 214,661 views 9:50 How to Change a Coolant Temperature Sensor - Duration: 26:00.
Typically when the engine computer loses the signal from the coolant temp sensor, it just turns both fans on high so the engine will not overheat. #4 LTC8K6, Mar 28, Cooling Fan Relay Switch Where there is a thermostatic switch in the circuit, start the car and let it run at fast idle. want to fix the car myself .
Full Answer > Filed Under: Car Parts & Maintenance You May Also Like Q: What can I do if my car ignition key gets stuck? In either case, if there is a current at the motor, the motor is at fault. On most Chrysler vehicles, the cooling fan relay must be engaged before power can go to the A/C clutch. Radiator Fan Not Working While Driving The controller contains a fan primary relay, A/C fan control relay, and wide open throttle cutout all built into one unit.
If the fan motor, motor relay or wiring is defective, the fan may not be working.Air or moisture contamination -- For therefrigerant inside the system to do its jobproperly, it must What could be wrong. If resistance is high, the coil may still be working but it is failing, or it may not work when electrical loads are high. news Changing the fan motor Disconnect the battery, and take off the wiring terminals to the motor or disconnect the plug.
If any these inputs are faulty due to a bad sensor or wiring fault, the PCM may not run the fan fast enough to keep the engine cool. Try Google Search. If low, it works less efficiently and does not cool well.Dirty condenser -- The condenser is the heat exchanger mounted in front of the radiator. The assembly usually has only three components - fan motor, thermostatic (or thermo) switch, and relay.
Nthefastlane 97,929 views 4:26 Cooling fan doesn't work - Duration: 7:16. Chrysler LH cars (since early 1990s). Changing a thermo-switch The thermo-switch is normally located in the radiator bottom tank, in the thermostat housing, or in the cylinder head. On applications with variable fan speed, the PCM's operating strategy likely takes into account inputs from a variety of sensors to determine how fast the fan should be turning.
Checking the new motor When you fit a replacement motor, check it by connecting its leads directly to the battery. PEOPLE SEARCH FOR How to Wire a 12 Volt Radiator Fan with Relay Radiator Fan Problems Car Air Conditioner Not Working Explore Q: How much paint does it take to paint The motor and fan normally come off as an assembly, but you may also have to remove the shroud and sometimes the radiator. To check the temperature at which the fan comes on, turn the A/C off and keep the engine running until it reaches normal operating temperature.
oldskool funk 297,222 views 29:09 How To Solve An Engine Overheat Condition - EricTheCarGuy - Duration: 26:09. Test for current with a test lamp or circuit tester at the 'live' lead to the relay — again with the ignition switched on. I believe this is the source of the problem. The gauge connector is typically a single wire, whereas the coolant temp sensor for the computer has more than one wire. #11 LTC8K6, Mar 29, 2009 her209 No Lifer Joined:
A: The purpose of a car water pump is to push coolant through the car's engine block, radiator and hoses to get the engine heat away from the system.