Blower motor/Push button issues

[firefighterwhite89]

Sometimes when I turn my heater blower on, it doesn't come on, just like it's still off...but usually, eventually will come on. Sometimes when it comes on on High, it's like its on low, sometimes high like it should be...it seems to either start working or stop when I hit bumps...and the vent/heat/defroster buttons rarely work right away as well. Sometimes I'll change from vent to defroster and it may take 20 minutes before it switches and rarely does it immediately switch. It all still works...just either takes time before it changes settings or starts working. I have the slider on bottom/push buttons on top temperature controls if that helps. Its in an 86 accord LXi

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[Hauntd ca3]

blower motor is probably worn out.
your cars is nearly 30 years old, so these things start to happen

[firefighterwhite89]

i'm leaning more toward a ground issue. My door dinger is also intermittently working. And ALL my door lights no longer work. Just gotta find the right ground spot without ripping the entire dash to pieces searching.

[Hauntd ca3]

all the door lights and the dinger , earth through the switches in the door jams.
and so does the interior roof light. does that work when you open a door ?
the blower fan earths through the fan resistor which is in the ducting near the fan motor somewhere.
when the fan is working, do all the speeds work , or just a few?
if they all work, it points more to the fan.
grab an old headlight bulb,a length of decent 2 core cable and a few spade terminals.
make up a lead so that you can have the bulb on one end and the plug for the heater motor on the other. unplug the heater motor and plug the bulb into the loom plug for the heater motor.
turn the ignition on and flick the speed control through the speeds, the bulb should get brighter in each posi from low to high.
if that works fine, the motor is to blame.
with worn brushes, a bump can make the brushes either jiggle out to the armature and it works fine, or sneak them away a touch which slows it down.
as for the ducting problem, it may be something as simple as crap in the heater box clogging things up and making the motors slow due to high load, shafts could be getting rusty after nearly 30 years of service or the pivots need a lube with some teflon or ptfe spray.
the motors for the ducts are pretty gutless, so it dosnt take much to slow them down or jam them completely.
if you can get to the individual motors, just unclip the rods off them one at a time and see if the move ok with no load on them, and also move the flaps be hand to see how free they are.

[Dr_Snooz]

This is what happens when you get too creative with the LED conversions. LOL

[firefighterwhite89]

Lol. This has happened for alot longer than any leds have been installed on my car. I've just been too busy with other things to work with this annoyingness

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[lostforawhile]

check the plug on the side of the blower where it plugs into the resistor. I dont have my electrical manual in front of me, or I would look it up