Heat not working

This could be the result of several things. Check these things first before relacing any components:

Coolant level
Coolant system, water pump, fan
Is the engine running at a normal operating temp?

Let me know. Also, with the engine hot, the heater on high, do both heater core hoses get hot?

Joe

My first guess is that the heater core is plugged. I recommend trying to flush it.