radiator fan turns on and off constantly

M

miller

NAXJA Forum User

Location

my own little world

• Oct 2, 2006

• #1

hello, my 1999 jeep cherokee 4.0L's electric radiator fan turns on and off every 30 seconds, its not only annoying but im concerned its going to burn out the relay aswell. The engine temperature is at a steady 210 degrees so its not running hot. Any advice?

 

J

JeepFreak91

NAXJA Forum User

Location

NC

• Oct 2, 2006

• #2

is your a/c on?

 

red91

NAXJA Forum User

Location

exact location unknown

• Oct 2, 2006

• #3

JeepFreak91 said:

is your a/c on?

Click to expand...

if it was it would constantly be running.

 

M

miller

NAXJA Forum User

Location

my own little world

• Oct 2, 2006

• #4

nope, no a/c, no defrost. just setting there

 

Saudade

NAXJA Member

NAXJA Member

Location

SoCal

• Oct 2, 2006

• #5

Try disconnecting the coolant sensor on the thermostat housing while the fan is running. Be careful!! If the fan stops then it may be the sensor itself.

 

J

JeepFreak91

NAXJA Forum User

Location

NC

• Oct 4, 2006

• #6

red91inWA said:

if it was it would constantly be running.

Click to expand...

not sure on yours but on mine it cycles on and off depending on the weather. and no it doesnt need a recharge but this is a 1994 not a 1999

 

P

pancake

NAXJA Forum User

Location

Seattle, WA

• Oct 4, 2006

• #7

My fan constantly cycles on & off when the AC is on as well. Doesn't do it other times though.