Not sure if this is the section. Please move if not. Thanks.

There is no hot air coming from the ducts. Only cold air.
Car is warmed up and no coolant leaks.
The heater hose going to firewall is cool to the touch while the hose from the radiator is hot.

What should I be looking for?

Thanks.

 

Gotta be a blockage somewhere... coolant isn't low or anything? Are you using an LT1 specific thermostat?

 

Actually this is for a friend's car and it's not a camaro but I figured this was the best place I know to get ideas.

I was thinking blockage but the hoses going to firewall is not exactly small.

 

For future reference, "LT1 Based Engine Tech" is only for topics about the engine. Moving to "General......"

 

Change the thermosatat & flush the heater core..

 

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