John Bonnett
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| posted on 23/3/23 at 01:30 PM |
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Which fan is which
I'm using a radiator and condensing radiator with two fans from a MK1 1.6 Focus. One fan has just a pair of wires going to the motor so it's
single speed. The other has four wires so I'm guessing two speed. Basic question, which fan is for the coolant and which for the aircon?
Thank you
John
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obfripper
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| posted on 23/3/23 at 02:03 PM |
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The 2 speed fan is for the engine and operates at the lower speed when just dealing with idle over temperature, and uses the higher speed where the
engine is under load to deal with the larger heat output of the engine in that state.
The a/c fan operates according to system pressure when the a/c is on, usually using a triple (trinary) switch to: protect against no-gas operation,
activate the compressor, and operate the fan.
Dave
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John Bonnett
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| posted on 23/3/23 at 02:28 PM |
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quote:
Originally posted by obfripper
The 2 speed fan is for the engine and operates at the lower speed when just dealing with idle over temperature, and uses the higher speed where the
engine is under load to deal with the larger heat output of the engine in that state.
The a/c fan operates according to system pressure when the a/c is on, usually using a triple (trinary) switch to: protect against no-gas operation,
activate the compressor, and operate the fan.
Dave
Dave, thank you so much
Kind regards
John
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