My '95 heat/A/C blower fan works only in position 4. I replaced the resistor block accessed under the dash, and for a few hours all 4 blower settings worked. What should I troubleshoot or replace that causes the resistor block to fail? This is my 2nd replaced resistor block. The first replacement worked for 6 months of Florida summer A/C.

Thanks for the help.
Jim

 

Answered here

 

Hi Clee130,

Your thread is informative about the resistor block location, failure mode characteristics and replacement, but my original post has to do with the root cause(s) of resistor block failure. I have replaced the block twice. The last replacement worked only a couple of hours before failure.

Thanks, and hopefully, someone knows the cause of failure, and can suggest my next course of action.

Jim

 

Jim, your fan/blower motor may actually be pulling to much current and causing premature failure of that resistor block.

Your next moave may be to replace the fan motor. Try a junk yard, I'm sure you can find a good working one there.

 

Thanks, The removed motor was tight and difficult to turn. Some 100 PSI air and 3 in 1 oil fixed the almost seized motor. Now working in all 4 speeds.

Much thanks...