Is it possible??
 

does anyone know if it's possible to make heat in the car actually hotter? my heat is more warm than hot. my temp. gauge seems to stay cold, so it could be the thermostat or the ECT sensor right? i'm assuming my heating problem is connected to my second problem.......can anyone help??

Any check engine codes?

The ect sensor would throw a code. So that's not if, if the lights not on.

Have you change your water pump and timing belt at all?

Check to make sure that the coolant is topped up.

Lastly make sure that the heater switch is sliding all the way open.

I'm thinking thermostat if your temp guage isn't really moving.

There is also a little valve in the heater hose that runs in through the firewall. mine stuck open and even though I was putting the heater all the way to hot I was only getting warm air. It is right behind the intake manifold at the firewall.