hey all -

i have an embarrassingly obvious question. basically, if i had the owners manual that came with the car, i could answer this question. on the blower switch on the dash control, what does the bottom button do? there are two halves to the switch - the top is a white fan, the bottom is an outline of a fan. i just got this car, and am trying to sort through some of its issues (of which there arent many - a possible ball joint, slow sunroof, some bulbs burned out, and a possible electrical issue with the horn/defogger which are sometimes a little flaky). anyhow, i cant help but notice that, while the blower activates when i press the top button, the bottom half of the button doesnt seem to do anything. sometimes i hear some intermittent clicks after pressing it, and then nothing else. also, when the blower is on, the heat that comes through the vents is not particularly hot at all, even at peak driving temps (80 deg. or so).

so a) what does that bottom half of the switch do? b) how hot should the heat be? and c) here is the car:



EDIT: heres another, possible non problem. before starting the car, when all the warning lights go on, i hear the buzz, but the glow plug light is usually delayed, and then tends to come on for only brief little flicker before going off. however, i dont seem to have any problems starting the car. is it possible that a sensor somewhere is just glitching, or can this be a symptom of something else?