I thought that was the low pressure line that's why I was confused. Does the AC button need to be pressed for the fan to run? When I bought my car that connector was loose and I had no AC. I did not notice the fan spinning all the time but I didn't try to run the AC since It wouldn't engage.


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You may be right Andrew, I am no HVAC specialist. I assumed it was the high side as it is the hotter of the 2 hard lines but anyway, start engine, turn A/C on and disconnect that sensor plug. The aux fan will slowly ramp up to full speed over 10 seconds if it is operational.

Successful trip through the Lincoln Tunnel last night. No overheat.

I pulled the plug on my high pressure line and the electric fan did nothing.

I am leaning toward the fact that it is dead given that it also never came on when I was experiencing the overheat condition.

I am considering to not change it and just let things be with the engine fan.

Well double issue as Andrew expected. At least we know why she would overheat so easily. Does your A/C work? When my aux fan went out the A/C compressor would not turn on.

yes, the AC works very good... so I wonder if maybe the Aux fan is not dead... can we say for sure if I disconnect the high pressure line on the AC, it should work, and if not then it is dead? So it turn on when the car starts up for a few seconds? I have not looked for that yet.

So - what if I do not replace it? Being that my AC works and the engine fan is new and working strong to keep the coolant low. I live in the Northeast so temp does not really get much above 100 at the most.

Your call but most of us want things working the way they were designed. When you did the fan test was the engine running with A/C on?

of course I want things working, but $450 (for a good fan, not one that will break in two months) and also it looks like a pain to install it with risk of cracking the tabs on the front bumper... not sure how worth it, it is. I guess I can see how I get along over the summer without it, see if the car is running hot or if the AC is not cooling.

I put the AC on MAX when testing the fan.

Coolant Temp Warning - pegged to red. Holy crap.
 

If the elec fan is not working the only real risk is overheating when in traffic jam and high ambient.


That's exactly when you want AC the most so definitely fix the fan of it's broken but since it's not used 99% of the time I have no probs with using a high rated knock off

True!

How hard is it to pull off the bumper and get the old fan out?