84 ranger 2.3 heat only works on high

[RangerFabWorks]

my heater only blows when my switch is on high. what is the problem?

 

[slycer2002]

Sounds like your blower motor resistor has gone bye-bye. Luckily, this is an easy fix.

 

[RangerFabWorks]

where would it be located?

 

[88broncoll]

It is in the blower box, closer to the engine than the blower motor. It is the only other thing with wires going to it other than the blower motor itself.

 

[RangerFabWorks]

ahh ok thanks

 

[valleyvinyl84]

+1 on the resistor and your plug is probably melted to the resistor so it would be a good idea to replace that too. And also the part # for the resistor is RU-318 and the part # for the plug is S-630. The manufacturer is Standard Motor Products.