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View Full Version : 84 ranger 2.3 heat only works on high

blackwidow67
02-01-2009, 11:42 AM
my heater only blows when my switch is on high. what is the problem?
slycer2002
02-01-2009, 04:33 PM
Sounds like your blower motor resistor has gone bye-bye. Luckily, this is an easy fix.
blackwidow67
02-08-2009, 06:40 PM
where would it be located?
88broncoll
02-08-2009, 07:10 PM
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.
blackwidow67
02-08-2009, 07:43 PM
ahh ok thanks
valleyvinyl84
02-08-2009, 07:48 PM
+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.