Has anyone checked the sender unit to the ECU to check if the transmitter (resistor reading ) is not ageing due to either heat or age and causing non liner response with fast changes
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Has anyone checked the sender unit to the ECU to check if the transmitter (resistor reading ) is not ageing due to either heat or age and causing non liner response with fast changes
I tried the A/C this morning and the fan does not power on when the A/C is on. Is there another condition such as operating temperature being reached before the electric fan operates?
I'm away with work for a week or so and will look more closely when I get home, maybe I have a problem with the electric fan?
Regards,
Tote
As previously noted, the a/c fan on the front of the condenser will come on with either the a/c being on or when a temp lvl is reached.Quote:
Originally Posted by Tote
go back to the basics....
*if the serpentine belt ever squealed, replace it.
*now you have the a/c fan not working, check the fuse if good, power up the fan, replace if needed.
to add to what Dazza suggested, replace the AC fan relay too. A blown fuse suggests resistance in the wiring. If the fuse is gone, i'd check the wiring for any obvious breaks/pinches etc. Be a shame to replace the AC fan to find a pinch in the wiring as the root cause.
The upshot, the likely cause for your overheating (additional heat load from the condenser) is a simple and possibly cheap fix.
If you go down the viscous fan replacement route, be mindful that the 2.4 used a 1" long nut and the 2.2 used a 2" long nut, moving the fan closer to the radiator. I assume no harm comes from mixing them up, just a difference brought to your attention.
Here is a link to an old post where I plotted coolant temp against load on a 130 2.2 on a hilly road
Ultra gauge temperature reading
see post #10
I logged data from the Defender 2.2 OBD port
Sampled for about 10 minutes on some undulating road. I purposely left it in 6th gear up the hills to put the engine under max calculated load (100%). The resulting graph is not surprising but confirms the kind of rapid temp increases others are seeing.
This test ranged from 88 under zero calculated load up to 98 at 100% (laboring in top up a hill)
Checked the electric fan today, it does cycle in and out when the aircon is running, easy fix eliminated.
Regards,
Tote