Blower Fan Works Intermittently


XXXXX

New member
Joined
Jan 14, 2017
Messages
4
Reaction score
0
Points
1
Vehicle Year
2009
Make / Model
Ford
Transmission
Automatic
I have a 2009 Ford Ranger 4.0L

Sometimes, but not always, the blower fan for heat and air conditioning does not work.

And then it'll come back on sometimes on its own. Sometimes it's after a minute, sometimes it's after 20.

It also seems to go on and off when I hit bumps in the road. So I'm wondering if it's not a stuck relay.

What do you guys think? The fan works fine when it does work.

Many thanks for the advice.

XXXXX
 


Rock Auto 5% Discount Code: 173A8B749AB83C Expires: January 1, 2020

Dirtman

Well-known member
EMT / Paramedic
Joined
May 28, 2018
Messages
3,499
Reaction score
1,489
Points
113
Location
Over there --->
Vehicle Year
2009
Make / Model
Ford
Engine Type
2.3 (4 Cylinder)
Engine Size
466.63 teaspoons.
Transmission
Automatic
2WD / 4WD
2WD
Tire Size
So friggin big!
My credo
Give me money.
Does it do it at all speeds? If it only happens below full speed then check the resistor. If it happens on full speed as well it could be a dead armature on the motor. This will make a spot where, if the motor tries to start in this specific position nothing will happen but if it gets bumped to the next armature it will start running fine.
 

ericbphoto

Old Redneck just wingin' it.
Supporting Member
U.S. Military - Veteran
TRS 20th Anniversary
Joined
Feb 7, 2016
Messages
2,962
Reaction score
858
Points
113
Age
55
Location
Wellford, SC
Vehicle Year
1993
Make / Model
Ford Ranger
Engine Size
3.0L
Transmission
Manual
2WD / 4WD
4WD
Total Lift
6"
Tire Size
35"
My credo
In theory, theory and practice are the same. In practice, they are different.
Or you could have a loose connection somewhere.
 

RonD

Well-known member
Joined
Jun 2, 2012
Messages
13,748
Reaction score
534
Points
113
Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
lol, loose connection.............................nailed it

In the engine bay on passenger side, near the fire wall is the heater/AC box
On this box you will see a 4 wire connector, end of it looks like this: https://www.dormanproducts.com/p-46940-973-411.aspx
This is the Resistor block

Unplug it and check for corrosion, or if its loose

Blower motor relay is in the engine fuse box, open the box and look on the lid there should be a "map" of which relays are which, they are all pretty much standard automotive relays and are not expensive

You could have engine off and fan on medium(you can hear it in the engine bay) then tap on the relay to see if fan cuts out, also move wire around to see if it cuts out
 

code_slinger

New member
Joined
May 3, 2019
Messages
1
Reaction score
0
Points
1
Location
Virginia
Vehicle Year
1998
Make / Model
Ford Ranger
Transmission
Automatic
I had the same problem. If i tapped on the fan motor it would start. Replaced the fan motor and fount the brushes were worn out. Worth a check.
 

XXXXX

New member
Joined
Jan 14, 2017
Messages
4
Reaction score
0
Points
1
Vehicle Year
2009
Make / Model
Ford
Transmission
Automatic
Thanks everyone. It was indeed a loose connection, right at the blower motor itself.

Thanks for putting me on the right track!
 

ericbphoto

Old Redneck just wingin' it.
Supporting Member
U.S. Military - Veteran
TRS 20th Anniversary
Joined
Feb 7, 2016
Messages
2,962
Reaction score
858
Points
113
Age
55
Location
Wellford, SC
Vehicle Year
1993
Make / Model
Ford Ranger
Engine Size
3.0L
Transmission
Manual
2WD / 4WD
4WD
Total Lift
6"
Tire Size
35"
My credo
In theory, theory and practice are the same. In practice, they are different.
Congratulations.
 


Top