I googled the price of a heater core. Turns out theres 2. 1 for the front and one for the back. I was told since both are blowing cold air its not my blender. Where do i look next? Do i check my thermostat or for aor in the system. Just bought it and have 2 kods need to gwt heat working. I have noticed that the front blower doesnt seem to run as fast ehwn set to the hotest setting. If o turn to cold it speeds up. Does that help diagnose anything regarding it only blowing cold air?

 

I would first pull the **** from temperature selector and pull another **** and see it the **** is possible worn and not turning correctly. Try switching the *****.

 

When the engine is up to temp carefully feel the heater hose where it comes out of the intake manifold to see if it is hot.
There is probably a restrictor inside the hose a couple of inches from the intake that is held in place with a crimp clamp, is it hot after that?
Next is a vacuum actuated heater control valve that shuts off coolant flow, is it hot after that?