Question about LG LH-D6230 System

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The fan quit working and the machine overheats. The fan runs full time if you connect the black lead to ground, but I don't feel good about having that little fan running 24/7. The circuit to PN300 seems to be open somewhere to the black wire of the fan connection. Is there somewhere else to connect the black fan wire so that the fan only runs when the machine is turned on ? Howard

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Check to see if there is a relay or timer on the board. Most likely there is a relay that is not opening up. You can test it with an ohmmeter if you can reach it's solder joint connections.

Posted on Aug 04, 2010

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Car gets hot pretty quick and will overheat, noticed fans arent coming on when car is hot or if I turn a/c on. Have caught them running recently but didnt catch it again.


it could be the cooling fan relays or possibly the cooling fans. to check the fans disconnect the plug at the fans and run jumper wires to them both power and ground. if they don`t work then the fans are bad. check voltage and grounds at the plugs when they should be running, if they are good then the wiring is good. it could also be the coolant sensor for the fans that send the signal from the sensor to the computer so it knows when to turn on the fans. the fan that runs with the A/C when turned on could be the A/C relay.

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There are some fan models (particularly with a remote control) that use multiple cycles of a single power switch to select the operating mode. For example, if you simply flip the switch on, you get the fan. If you flip it on, then off, then on again within one second, you get the light. If you flip the switch on - off - on - off - on, you get both. The trick is to do it fast enough so the internal power circuit doesn't run out of capacitor charge and forget what you're trying to get it to do.

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Radiator fan on drivers side will not engage motor overheats. what can be the cause?


There are a few. I have see the ground rust off, the fan motors burnt out, the fuse relay box. The best way to check is using a test light connect it to the two wires of the fan run the engine. If the light comes on before it starts to overheat then check the fan. If not the check the relay. But before you look at the fan make sure the fuse is good.

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Overheats if left idling but not if driving...cooling fans aren't coming on...what couls be wrong?


the cooling fans on your car are comanded on by the engine control module which reads engine temperature from the temperature sensor . when comanded on the engine control module sends a signal to the cooling fan relays . which in turn runs the current to the cooling fans . So you might want to check the cooling fan relays and make sure the fues for the cooling fans are good and the relays .if the cooling fan fuses and relays are good it could be a problem with the fan motors or the engine control module not reading the right temperature in that case it could mean you have a problem with the temperature sensor

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My computer overheats and shuts down every time I run an intensive program, what can I do to better cool down the system. I already moved it to an open spot and cleaned out the dust


make sure all dust is clear of the processor heat sink. then if you overclocked the processor you may want to back off overclocking a little bit. make sure you have plenty of thermal silicone paste in between your processor heat sink and processor

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At first I thought I only had a burned out drivers' side headlight. I replaced it and it worked. But neither of the two high beam lights work. In fact, when I turn on the high beams, all the headlights...


You have a rusted out ground leads to both front lamps. It may be bad enough rusting up front that effects both fenders. Run some heavy ground wires from negative of battery to both fenders, then tie in the negative lamp leads to the fenders. Might as well make sure the ground connections to everything else are holding up as well. I've added grounds to windshield wiper motors and blower fans that quit working as well.

Aug 09, 2010 | 1987 Chevrolet Nova

1 Answer

My jeep has dtc 1491 it has to do w my coolin fan circut .replaced relay and juped fan it works but wont cut on when plugged in.any ideas


Aside from checking the actual wiring for proper connections and shorting, the only thing you have not changed is the temp sensor. Sensor sends a signal to the computer which sends a ground to the relay which then completes the circuit to the fan. The fan should not run full time but only when needed. Sometimes covering the front of the grille with cardboard to force it to overheat is faster than standing there waiting for it to get hot enough to come on. If it begins to overheat and the fan still has not come on, change the temp sender and check the wiring and connectors with a meter. The computer could also be bad but that is extremely rare.

Jul 01, 2010 | 2000 Jeep Grand Cherokee

1 Answer

When idling saturn ls 4dr sedan wants to overheat


Sounds like either you are low on coolant or the cooling fan isn't working. With engine cool remove radiator cap and check coolant level, top off if necessary. If full start engine and turn on A/C full blast, full cold the cooling fan should come on almost instantly, unless there are two individual cooling fans in which case only one may turn on. If no fans turn on check all fuses whether related to fan or not. If all fuses fine try swapping relays around, they are usually all the same size/style. If fan still doen't work you have either an open positve or ground side of the circuit, Which will require wiring schematics and a multimeter. If coolant full and fan/s turn on and engine still overheats you'll need a new thermostat installed.

Mar 24, 2009 | 2000 Saturn Ls 4dr Sedan

2 Answers

95 grand am radiator fan only runs with AC on


Cooling Fan Temp Sensor is the First thing You Check (with what you have described) Cooling Fan Should ALways come On When The A/C is turned On as A/C Adds A Load to Engine, If Temp Sensor is Faulty it Will Not Give GROUND Signal to ECM >For COOLING FAN >RELAY to Give ground and turn ON The Fan.
There ARE 2 temp Sensors that Serve Different Purposes 1 is for Dash READING GAGE & Or TEMP LIGHT the Other is For ECM or Fan Relay (SAME Thing) you Said>""can disconnect the sensor and fan continues to run" < This Leads me to think you Changed the Wrong One. Not Questioning your Skills Just Here to Help.
TEMP SENSOR FOR 3.1L V6 is Located upper RH rear of engine compartment, near exhaust system. Temp SENSOR for 2.3L Engine is Located in LH rear of engine compartment.
I Hope this Helps Lead you to a NON-OVERHEATING Pontiac.
Good Luck and Have A Great Evening. rejakwilson

Feb 04, 2009 | 1995 Pontiac Grand Am

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