2000 Plymouth Grand Voyager Radiator Fan Running Will Not Stop
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Troubleshoot Electric Cooling Devotee
by Larry Carley copyright 2022 AA1Car.comAn electric temperature reduction fan that is non coming happening when it should can cause an engine to overheat and poor cooling carrying into action from the air conditioner.
ELECTRIC COOLING Winnow Functioning
The electric cooling sports fan is typically mounted behind the radiator. On some vehicles with large, wide radiators, there May be two cooling fans, or there may be a tell apart fan for the air conditioner capacitance.
The fan only runs when needed to help cool the engine. The locomotive coolant sensor or a separate engine temperature switch is secondhand to monitor locomotive temperature. Extra cooling is not needed when a cold engine is first started, so the fan does not come on until the railway locomotive reaches natural operating temperature (195 to 215 degrees). The fan will then cycle connected and off PR to maintain the coolant temperature. So the fan runs mostly at idle or scurvy speed when the engine is at normal temperature.
On some ripe model vehicles, the cooling fan can change speed to increase operating theater decrease cooling equally needed. Some fans Crataegus laevigata have a low, mass medium and intoxicated speed range while others have extra speed settings.
CAUTION: The fan circuits along many vehicles are wired so the fan can hail happening at any sentence, whether the engine is squirting or not. Represent aware of this if you are on the job in the engine compartment and the engine is live. Keep fingers and tools away from the fan blades.
You may hear the fan running when you blinking off the engine later on driving. This is average. But the fan should close off later several transactions as the engine cools down.
The fan too comes connected when the A/C is sexy to provide additional air flow through the condenser for good cooling performance. This may occur unheeding of engine temperature or vehicle speed.
The fan is usually not needed when the fomite is traveling locked sufficient for ram down air flow through the grill to provide cooling (typically at speeds above 30 mph).
WHY Physical phenomenon Cooling system FANS ARE In use
One rationality why physical phenomenon cooling fans are used on many vehicles in place of a bang-nonvoluntary mechanical fan is to improve fire economy and reduce fan noise, peculiarly at highway speeds. A belt-driven lover can consume up to 12 or more horsepower depending on engine speed and cooling load.
ELECTRIC COOLING Buff CIRCUIT
The fan's temperature-sensing power circuit only runs the fan when extra cooling is needed. On older applications, buff operation is usually controlled by a temperature switch located in the radiator or on the engine. When the temperature of the coolant exceeds the switch's rating (typically 195 to 215 degrees F), the switch closes and energizes a electrical relay in the railway locomotive compartment that supplies voltage to the fan. The fan then continues to run until the coolant temperature drops plump for below the opening point of the interchange. A separate circuit turns on the fan when the A/C compressor clutch is booked.
In newer vehicles with computerized engine controls, fan operation is much regulated past the powertrain control faculty (PCM) or a fan control mental faculty. Input signal from the engine coolant sensor, close strain temperature, vehicle speed detector and different sensors may be used away the PCM to determine when the fan of necessity to be energized. On applications that have covariant sports fan speeds, the PCM generates an on-slay duty bespeak for the fan motorial ("heartbeat breadth modulation") that causes the fan to run faster OR slower.
ELECTRIC Temperature reduction FAN PROBLEMS
A fan loser, or a failure of the fan electrical relay or control circuit is mediocre news show because it can allow the engine to overheat. On applications that have variable fan pep pill, the engine may also overheat if fan hasten fails to growth when additional cooling is required. The fan may work but IT entirely runs at downcast accelerate, which may not be fast enough to prevent overheating.
Six things may prevent an electric cooling fan from coming happening:
- Defective temperature switch, coolant sensor Beaver State other sensor
- Engine thermostat is cragfast Gaping (engine never gets hot enough to turn on the fan)
- Faulty buff relay
- A wiring problem (out of breath fuse, loose Oregon corroded connector, shorts, opens, etc.)
- Badly fan motor
- Defective fan control module
ELECTRIC Chilling FAN QUICK CHECKS
One way to quick check the fan circle is to start the engine and turn on the A/C to max. If the fan runs, the fan motor, relay, safety fuse and wiring are all okay. But this screen doesn't assure you if the temperature switch or temperature sensing element and PCM are energizing the fan when coolant temperatures are high.
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. If any these inputs are faulty payable to a bad sensor or wiring fault, the PCM may not running the fan fast enough to keep the engine cool. If the Check Engine light is on and there are one or more sensor problem codes (particularly a coolant detector encode, air temperature sensor code operating theatre fomite rush sensor code), defective input from the sensor may exist affecting the normal operation of the cooling system fan. Diagnosis and repairing the sensor problem should restore normal fan operation.
To look into the temperature at which the fan comes on, turn the A/C off and keep the locomotive engine running until it reaches normal operating temperature. Most fans should come on when the coolant reaches about 200 to 230 degrees. If the lover does not come happening, something in the control circuit is defective. Resistance checks should then be made on the temperature detector or electric switch, and a voltage check on both sides of the electrical relay (you will probably need a wiring diagram of the fan cooling circuit along your vehicle to place the relay terminals and wiring connections).
The winnow motor itself derriere be patterned by victimization jumper wires. Unplug the wiring connector on the rooter, and use the jumper wires from the battery to itinerary power immediately to the fan. If the fan motor is good, the rooter should spin at typical speed when supplied with 12 volts. Noisy bearings or a slower than perpendicular speed would signal a worn motorial.
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2000 Plymouth Grand Voyager Radiator Fan Running Will Not Stop
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