Heating controls will not change from floor to defrost on 99 accord

Marvin

• 85242 Answers
• Posted on Sep 16, 2008

SOURCE: vent controls

You have lost vacuum to the control head or the vacuum switch is defective in the control head, the vacuum comes from the engine.

SOURCE: poor air flow from floor vents or when multiple vents choosen

There has to be something blocking the output somewhere. Check where vents come out to see if something has fallen down to block them.

SOURCE: 89 Honda Accord Heater doesn't blow air at all

sounds like the blower motor, Get a test light and hook it up to the wires going to the motor this will tell you if power is getting to the motor . Hopfully it is , Just pull the panel off on the pasangers side under the dash and you can see the motor . It's easy to change and should fix the problem. If you get no power it check for power at the switch on the dash . It could have gone bad !!

SOURCE: In my 1998 Honda Accord Lx the hot air does not

In my 1998 Honda Accord Lx the hot air does not come out of the heater vents in the floor, the same is true for cold air in the middle vents on the dash. The side vents on the dash work fine.

SOURCE: Heater control to feet has never worked 95% of the time since new

sounds like vent flap valve wire has come off (under dash beried in plastic cowling.....