Fan Cycle

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Fan Cycle

12-16-2016, (Subject: Fan Cycle )

Post: #7

Rawze

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RE: Fan Cycle

some possibilities ..

If there is an intermittent connection to the A/C pressure switch, the thermostat sensor, or to the fan solenoid itself, it will cause the fan to come on and off unpredictably. Corrosion in A/C pressure switch is a very common one. As well, if the system is low on refrigerant, and it is right around the minimum of about 50 PSI or so, it can cause the same problem on some trucks.

Lastly ...
You also mentioned "custom tune". If it is MM and you know it was done right, then the re-programming should not be the culprit. If it is not MM, then who knows what someone could have done.

You should be able to find out what is tripping the fan on via ecm or cab control software, etc. as well.

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Messages In This Thread

Fan Cycle - axe - 12-15-2016,

RE: Fan Cycle - 8042 - 12-16-2016,

RE: Fan Cycle - Hammerhead - 12-16-2016,

RE: Fan Cycle - axe - 12-16-2016,

RE: Fan Cycle - hhow55 - 12-16-2016,

RE: Fan Cycle - in2trux - 12-16-2016,

RE: Fan Cycle - Rawze - 12-16-2016

RE: Fan Cycle - axe - 12-17-2016,

RE: Fan Cycle - Nilao - 12-16-2016,

RE: Fan Cycle - athens - 12-18-2016,

RE: Fan Cycle - Nilao - 12-19-2016,

RE: Fan Cycle - T680 - 12-19-2016,

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