Could be,
low on coolant,
a stuck open thermostat,
a plugged up heater core,
a faulty temp blend door mechanism,
An air conditioner blows out heat
No, not if it's on a heat setting. Most home thermostats have a "Fan" setting that will blow cold air if the attic is cold.
it wont blow heat itll blow cold air
Check the colant level, it may be low.
Air conditioning will expel heat to the outside when cooling. On the heat cycle the reverse is evident
A heat pump is designed to extract heat from the outside air, even during cold weather. It uses this extracted heat to warm the indoor air. This is why a heat pump blows warm air instead of cold air during operation.
check your thermostat first
You're probably out of frion, my friend.
it may blow cold air due to the fact that the heat anticipator on your thermostat may be set to long. you can change useing your owners manual for your thermostat but you should have a service tech do it
It doesn't really blow it out it just warms the cold air.
If it does blow just not cold air you should see if it needs to be recharged
Most common problem is that the blend door is stuck or broken.