Thanks in advance if you can assist me.
Ford f150 blower motor resistor keeps burning out.
Ford blower motor resistor problems remain the most common solution to interior fan malfunctions on ford cars and trucks.
This is why at the bottom of the article we include a 2008 f150 blower motor wire diagram.
The ford blower motor resistor assembly covered by this tutorial has 3 different resistors in series and depending through which resistors the blower motor current is flowing thru on its way to ground you ll get one of three speeds.
I finally found the simple solution and ultimately the actual cause to the issue of the blower resistor burning out and over heating the plug wiring the blower motor itself is the culprit.
After years of replacing the blown resister module 3 to 4 a year i finally bit the bullet and bought a new blower fan motor.
The blower motor relay controls the current used to power the blower motor and is subject to the constant on and off switching.
When the blower motor relay does begin to fail the vehicle will usually display a few symptoms that alert the driver of a potential problem that should be serviced.
I originally replaced the blower motor resistor and it worked for about two weeks.
It starts out slow and you figure there is something wrong with resistor resistor connector which melted or the blower motor s old or they don t make these blower motors like they used to.
For any damage or signs of burning.
I checked the blower relay and the guy at autozone said if the relay is bad then i will hear clicking under the hood while the motor is running.
Conduct an amperage draw test at the same time to rule out excessive current draw from the blower motor.
Yesterday the air stopped blowing again wouldnt work on any speed.
I checked the blower fuse and it looks good.
Also make sure.
Over time it can eventually wear out.
Water leaves and debris in the airflow can cause blower motor resistor failure.
Purchase an upgraded pigtail and splice it into the harness along with a new blower motor resistor.
I replaced the blower resistor and it worked just fine for about 2 weeks.
Daryl shop owner master mechanic.
I have a 2008 f150 4 6 v8 while driving with my ac on and fan on high the fan blower briefly cut in and out and then blower stopped working.
Basics of troubleshooting the blower control resistor.
With that said failed blower resistor assemblies don t solve all of the possible failures.
Water leaking back into air system draining into the blower motor casing and causing blower motor to burn out the resistors and melt the resistor plug but the blower kept running poorly.
Verified i would suspect the blower motor is the problem if the resister keeps burning up if there is a large draw because of the blower motor it can cause this this can be tested but a amp probe would be needed typically only mechanics have this tool.
If you discover a melted connector do not attempt repair.
