heater probs

[exploderlepracy]

my heater will only work on full blast, the relay is good but i cant figure it out and i just want a second opinion before i start ripping everything apart, so its only two settings are off and fullblast.

 

[skipmac]

Hi.

Having the same problem in a 1998. Seems to be max heat or no heat. Also, get heat when I try to use the AC except on Max AC with the temp set to the minimum possible.

Greatful for any hints. My experience with the local dealer has not been positive so hesitant to take to them unless I have a good idea what's going on first.

 

[Critter92X]

My 92 is the same way.I changed the relay(resistor) today and it didn't help it.I pulled the blower fan switch out of my parts truck but it got dark on me before I could change it.I figure that is probably the problem since it isn't the relay(resistor).