Ford F150 Heater Fan Only Works On High

You should check and make sure the blower motor is working properly not jammed or any obstructions preventing the free movement of the blade fins.

Ford f150 heater fan only works on high.

This video highlights a common issue found on 2011 ford f150 pickups with automatic hvac systems when the blower fan speed becomes stuck on high speed. 4l3z 19a706 aa or napa part number. This is the most common failure mode. I would like to thank everyone who contributes information.

Fan kicks on about 30 seconds after vehicle is started and is extremely loud. The 2004 2014 ford f 150 with manual temperature and fan controls may have problems with the the blower motor only blowing air on certain settings. And yes the resistor is bypassed with the fan is on high. In other designs the failure of 1 resistor means you lose only one speed.

My truck ia a 1999 f150 with manual heat ac 115 000. Articles how to s heater blower fan fix only high speed i did my search and found plenty of help. This happens very often to ford pickup truck or suv. Most commonly the fan will only run on the highest setting.

Correcting the problem is straight forward and requires replacement of the small resistor. All you need to do is to replace the resistor ford part number. Any obstructions or hindrances can blow the resistor quickly. My fan was working on high only.

This is a well documented problem and is caused by a failing blower motor resistor. I thought i d contribute a couple pictures. However most car makers bypass the blower motor resistor completely when you move the fan speed switch to high. If your blower only operates on its highest speed chances are you have the series type of blower motor resistor.