More heat please

[Cue-Ball]

There's an easy way to tell if the engine is getting hot enough. Just drive around for 10 minutes then stop, open the hood, and put your hand on the top radiator hose. If you can grab that hose with your bare hand for more than half a second without burning yourself, your engine is not getting up to temp (which means you probably don't have a thermostat, or the thermostat is stuck open).

If the engine isn't hot, the heater won't put out heat either. If the engine IS hot, then you just ruled out one possible problem. Try putting your hand on the hose running to the heater core. If it's hot too, then either the core itself is plugged up or your heater mechanism isn't working properly (air temp door not moving).