hi, my 1986 dl wagon recently had the heater motor fail.  it was weird.  I arrived at my designation and turned off the car. the heater was still blowing.  it turns off once the car if off, I had the key out.  then I turned the knob to off and it still was blowing.   is there a relay I cam check?  the fuses are good.  what can I check?  what do I need to replace?

Resistor pack ? It’s in the heater blower unit as I recall. Been a while but I think you can do it without raising the dashboard.

Try a search of the archives. Good luck. 

does seem more like a relay.....

24 minutes ago, 1 Lucky Texan said:

does seem more like a relay.....

Or possibly the switch .

 

Has to be 2 things at once.

1 Either the ignition switch is not really off or the relay is stuck.

AND

2 The fan switch is fubared or the wire from the switch to the fan motor is shorted to ground.

the air is hot when o am driving.  doesn't change power with e switch.   where is the relay located?  can someone post a picture?

 

thanks

I have had this happen a number of times on my 1986 GL10.  There are about 5 silver 1" diameter x 1 1/2 long gismos that I believe are switches, under the dash board and just left of the steering wheel column.  They plug in and pull out.  If you take a look at each one by unplugging it, you may find one that overheated and is slightly dis-colored.  That's the one that is fried.  You can swap it out with another one that is working but obviously, you will want to get a good one so that everything is working.  They last a long time, so used ones are Okay to plug in.

it was a switch that fail.  took 4 years to figure out so lame.  But I have a heater now.

 

So Awesome that you came back and updated this thread after three years - and admitting you only just fixed the issue! 

Cheers 

Bennie

I know. So simple yet some hard. Not very mechanical.