I have the automatic climate controls in my 99 Solara. The blower motor comes on only when it wants to, regardless of fan or tempter settings. There is no adjustment, one speed (not high and not low). Mostly there is no fan or air circulation regardless of heat or ac setting. Totally unrelated to driving conditions (bumps, turns, speed or full stop) or weather (hot, cold, freezing, wet or dry), it just starts blowing for a short time and then it stops again. Everything seems to work with the controls other than the fan speed. When the fan is on, I can turn it off & on but still the same speed. But when it decides not to come on, I cannot get it to come on regardless of control settings.
After reading some of the blogs, I replace the blower motor resister. I should have realized that the resister was to reduce the blower speed so that was a wasted effort (difficult, yes). The net is the same, low blower speed regardless of setting and when it feels like it.
After reading some of the blogs, I replace the blower motor resister. I should have realized that the resister was to reduce the blower speed so that was a wasted effort (difficult, yes). The net is the same, low blower speed regardless of setting and when it feels like it.