Thermostat stuck open. Heater core clogged. Heater temperture control valve defective. Low on coolant.
Low coolant in the system. Defective heater control valve. Clogged heater core.
The heater valve could be failing to open for one reason or another.
Check Antifreeze level..make sure there are no leaks under the vehicle.
It doesn't really blow it out it just warms the cold air.
Either a faulty thermostat or you have a low coolant level.
Your heater will blow cold air only.
My 2001 Chevy Blazer was blowing cold air when I had the heat on. My husband flushed the line to the heater core and a bunch of junk came out and now my heat works great. My 2001 Chevy Blazer was blowing cold air when I had the heat on. My husband flushed the line to the heater core and a bunch of junk came out and now my heat works great.
you must have low coolant or a bad heater core
The front expansion valve is clogged.
it wont blow heat itll blow cold air
you are low on coolingliquid !