Hi, I have a 2007 expedition EB. charging the A/C i have an issue where my high pressure keeps spiking up over 300.. the question i have and i think my issue is related to the fan clutch, the fan clutch is a combo electric/mechanical. when i engage the a/c should i heard the fan kickup in speed? right now no matter how high the pressure gets i have no change in fan speed. with the vehicle off and key on and a/c engaged i can spin the fan freely... i guess im asking what is normal operation for the fan/clutch? and easiest way to test it?
2007 A/C pressure and fan clutch
- Thread starter sentry6
- Start date
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stamp11127
Full Access Members
Is your cooling temp rising and getting close to the red zone? Most cars with electric fans will turn on at least one fan when the ac is on.
You can test the fan clutch by observing the fan while the engine is running at a fast idle and the temperature is climbing. It will get to a point where it should come on. If it doesn't the temp will keep on rising towards the hot zone of the gauge.
You can test the fan clutch by observing the fan while the engine is running at a fast idle and the temperature is climbing. It will get to a point where it should come on. If it doesn't the temp will keep on rising towards the hot zone of the gauge.
docraymund
Full Access Members
Your fan clutch is governed by the ecu. Normally when you turn on the ac it automatically engages. Test the wires going to it for proper voltage. If you need to change it, consider going into E-fans instead.
Thanks for the information. the clutch is receiving signal, just doesn't fully engage. I ordered a replacement. Does anyone know the fan clutch nut size? I saw it listed as 47mm for 07 and 08 only and that all others are 36mm?
