Aux Fan will not run with A/C on.

garr · May 27, 2009

My Aux Fan turns on when the Engine temp reaches 215-220 or so, But it does not run when the A/C is switched on.
First off before anyone ask, The A/C works fine, I searched for a day & found no answer.
What causes the Aux Fan to run when the A/C is switched on?
Is there a sensor somewhere I should check?
Thanks in advance!!

kennzz05 · May 27, 2009

not positive but ive had times where mine wasnt running when i thought it should(98) im thinking it works off head pressure. i was going to try and wire it directly by the time i figured out which wires to power it was working

mrtosh · May 27, 2009

Should be able to jump the low pressure switch on the condensor w/a paper clip when the air is on and it should turn on the E. fan.

Saudade · May 27, 2009

Ken's correct. The elec fan is switched on when the high pressure side rises above 280psi. It's controlled by the high pressure switch, not the low one. You should check the working pressures to see what your high side is doing. You could be low enough on refrigerant to keep the high side below the limit but still high enough to blow cold air.

Tim_MN · May 27, 2009

You didn't include your XJ info in your post. The 2000 and 2001 E-fan runs on the basis of engine temps only, the A/C has no effect on the E-fan. If your temps are good, is there a problem ?

garr · May 27, 2009

Tim_MN said:
You didn't include your XJ info in your post. The 2000 and 2001 E-fan runs on the basis of engine temps only, the A/C has no effect on the E-fan. If your temps are good, is there a problem ?

I Have a 2001, so I guess there is no problem.
Thanks for the answer!

Aux Fan will not run with A/C on.

garr

NAXJA Forum User

kennzz05

basic dumbass

mrtosh

NAXJA Forum User

Saudade

NAXJA Member

Tim_MN

Freakish Hand Strength

garr

NAXJA Forum User

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