My heater stoped blowing hot air.antifreeze level

If both hoses are hot, the problem could be the inside...could be a blend door actuator

First check the anti-freeze level, a low cooling system is the most common cause of no heat, next check for a kinked heater hose after that the water pump or heater core are suspect. I hope this helps. Take care.

Check water level in radiator, could air locked

check radiator coolant level when cold and if you need to top up only use antifreeze ,if problem persists and its losing coolant then take to a garage

Sounds like a restricted heater core. Remove the hoses and back-flush the heater core system with a water hose. You may want to do a complete cooling system flush while you're at it.

If you can't flush the heater core clean with a water hose, it may be time to replace.

thermostat is sticking open

Try flushing or blowing high pressure air through the heater core lines. its sludge build up and need to be flushed through heater core only. check antifreeze fluid level. only put in straight antifreeze, do not mix. most people do not know what mixture should be, so be safe and add straight, it will not hurt it, i run 100% straight antifreeze and never had a problem or worry about it ever freezing and cracking my block, heads or radiator cracking.

Start simple, check the coolant level, if it's too low, hot coolant won't reach the heater core, resulting in no heat. If the level drops further, the engine overheats. So check the level 1st, if it's ok, what does the engine temp gauge indicate? Is it running cold, normal, hot?

sounds like you have a actuator problem or the heater core may be stoped up check and make sure actuator is moving if not replace

make sure both heater core hoses are hot to touch at operating temp if both are not hot replace heater core

and of course check your coolant/antifreeze and insure it is full no water no heat

Feel the hoses going into the heater on the firewall. If one is hot and the other is cool, then the heater control valve is not working for whatever reason. Check the flow valve.