I have a 2004 Honda Civic LX and my heater stopped working. Before it would work fine then it would stop working. I would be driving and hit a bump then the heater would turn on again. The Coolant is full. I was told to hit around where the glovebox was and sure enough when I did that once before the heater turned on and it just stopped working again. What could be wrong with it? Heater Core or Thermostat? Help!
Heater core and thermostat wouldn't have anything to do with that, sounds like your blower motor or a blend door is stuck on your climate control.
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