air blower problems

[mn_cb7_boi]

hey guys my friends has a 92 accord and since i dont have one any more i decided to help him out so the problem is that when turning the knob on the air blower it blows on low 1 and 2 but when switching it to 3 and 4 nothing we tryed swaping a whole new heater blower and nothing also we switch the knobs and nothing still the same any ideas

[TheNextAZN]

so when you turn it on to 3 and 4, the air pressure stays as if it was on 2? and you have tried rebove the knob and turn the metal rod(where the knob connects) with a pair of pliers?

hmm.. either something is broken inside, or it's clogged. I say smack ur center console from ur passenger side. maybe tap on the back of the heater box and spray it with some canned/pressured air. maybe even spray air from the knob assembly area.

[Losiracer2]

there is this white ceramic resistor switch on the blower motor housing that could be bad, it controls the fan speeds. Try swapping it out w/ a JY one and see if that helps. Its got a plug on it and mounts on the housing on the exterior. You should be able to see it pretty clearly w/o having to take anything apart...once you have the blower motor housing out.

[IAmTheNight]

Sounds like the switch is seizing after speed #2. Personally I would do some probing and diag. before I replaced anything, but since nobody likes to do that around here, I can guarantee you replacing the switch will solve the problem.

[mn_cb7_boi]

ive switch the resistor on the heater blower and nothing still the same

tryed useing pliers to turn but pass 2 it shuts off and no air flow

ive switch the whole air blower switch from a junkie and the samething

the only thing i can think of is something electrical must be going on or something is wrong with the blower it self