Hi

I have a 98 Honda Civic Lx. When I turn on the heater, it blows cold air. I replaced the thermostat and the heater valve but still the problem is there. Any suggestions?

Ray

2 possibilities...

The switch/dial that moves the "door" to direct the air through the heater core is broken...

Maybe the heater core is plugged so no coolant is running through it?

Just ideas.