Turbo-LT1

like the title says the fan will turn on... click off. wait about 20 seconds then it will turn back on and instantly turn off.. its just really annoying.. it does not matter if i have my ac on or my heat on.. or if im driving or sitting still it.. it also runs right at 210.... any sugestion of what it might be?

stockli

Do you have your defroster or ac on?

That fan will cycle when you have the ac compressor running.

leecarr

Could be a bad temp. sending unit. The relay that runs that is in the main PCM so be careful not to fry it testing things.

Gionet

can someone with a 95 take a picture of the aux fan relay, according to the explodes of where its supposed to be, there is nothing even in the area on my heep, so id like to see it.

djb383

There are 5 positions on the vent selector that engage a/c. Efan is on when a/c compressor is engaged. On/off cycling could mean low refrigerant.

Turbo-LT1

it does not matter if the heater is on.. def. ac. vent or its just off it will turn on and off the whole time...

Turbo-LT1

even if its on heat would the fans cycle with refigerant

djb383

Might want to verify coolant temp, the CTS (as suggested), fuse/relay/something electrical, etc. 218 coolant temp or compressor engaged are the 2 criteria that turn the efan on when all is functioning correctly.

djb383

When u say "even if it's on heat" is not clear. Heat is way more powerful than a/c. There are 5 vent selector positions that engage the compressor, which engages the efan. If the heat selector **** is turned to the red (hot), the compressor (and efan) can still be on but u feel heat, not cool. Just saying make sure the vent selector is not set in one of the 5 positions that engages the compressor.

Turbo-LT1

well it does does it even when its off.. ill replace the big block fuse tomorrow or whenever i can get the fuse.. all the other fuses are fine

leecarr

If the fan comes on at all I don't think it would be a fuse.

stockli

Are you referring to turning the blower off or turning the whole system off. Turning the blower fan off doesnt turn off your heat and ac.

your compressor will run on any of the ac modes, or both of your defroster modes.

So the question still remains. Are you running with your defrosters or ac on?

highwater

Do like I did and run you a toggle in to the dash and be done with it. Hardly use my electric fan unless Wheelin

leecarr

How did you wire it, did you use a relay and fuse? I'd like to do the same thing with my 99.

yamichi

Any progress on this? My girl's jeep is doing the same thing...