my heater only blows cold air why the ac side works fine

Do you know how many heater cores I have had to flush and both hoses were hot.

When someone has COLD, not WARM, either there's no flow threw the heater due to being plugged and there's always a huge different in temperature from the inlet hose compared to the outlet hose, real low on coolant or actuator that works the blend door failed.

No sh t. Are you trying to teach me and like I said just because both hoses are hot doesn't mean the heater core is hot enough to put out heat in cold weather. So why the lesson that I learned in 1968.