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radiator fan not work when turn ac on

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Old 06-17-2015, 06:09 PM
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Default radiator fan not work when turn ac on
1989 dodge dynasty/ my radiator fan does not come on when I turn the ac on. when the car heats up the fan will cycle on an off so fan is good. any ideas
 
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Old 06-17-2015, 06:12 PM
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Does the ac compressor come on? If the system is low, the compressor will not come on and the cooling fan will only come on when called for by the temp.
 
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Old 06-17-2015, 06:31 PM
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yes the compressor comes on an will cool about 20 deg cooler that outside tem as long as car is moving when you stop the air coming out of vent starts to head up unless the fan comes on due to eng tem going up
 
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Old 06-17-2015, 07:43 PM
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Single or dual fans? If single fan, is it a two speed? Possibly fan motor or relay.
 
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Old 06-17-2015, 08:15 PM
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it is a single fan it has two wires going too it I just figured it was battery and ground will break out the meter and chk for battery on both leads thanks
 
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