hi everyone my heater work fine,but it blows warm air not hot any ideas ...

 

Hot engine coolant runs through the heater core to heat it up.
In the winter, you have to wait a little longer for your engine to warm up (During that time, you have no heat).
Check your temp gauge. If it warm up too slow, or can't reach it's normal operate temperature then you have a bad thermostat.
When you adjust the temp **** in the cabin, it open/close a valve. That valve allows engine coolant to flow through the heater core.
You have to find where that valve is. Usually it's in the engine bay near the firewall. It has a metal wire (Like a bicycle brake wire) that is connect to the temp **** in the cabin. When you adjust the temp ****, you just simple pull that wire, and the valve to open. If the wire runs too loose, or the valve can't be open fully then you get less engine coolant to flow through the heater core.
Another problem with the heater core is it can be plugged inside. That would restrict the engine coolant to flow through it. You can try to flush the system to flush out all the sludge, and particles built up in there.
If the heater core is too dirty on the outside, you will get less heat also.

 

Assuming your cooling system is topped off and all the air is bled out, it could be a bad thermostat, which would be noticeable by the temp gauge not reaching normal operating temp. Could be your blend door out of adjustment or a partially clogged heater core. After the engine is warmed up, if you feel the 2 heater hoses where they connect to the heater core at the firewall, they should both be hot. If one is much cooler than the other, then coolant isn't flowing through it. There is no valve to regulate coolant flow through the heater core, so if it's not flowing, it's because it's clogged. Sometimes back flushing the heater core does work.

 

This ^^. Make sure your coolant level is in proper order and all air is bled. I would start by next feeling the heater core hoses. They should almost both be too hot to handle.

 

ok thanks for info where the heater core hoses located

 

The heater core is under the dashboard.

Look in your engine bay. Two hoses go into the firewall. Usually they are next to each other. Hot to touch when engine is hot.

The inlet hose get coolant from the top of the engine.

The outlet hose directs coolant back to the bump.

 

I was a douche this year =) an put in a hotter thermostat for the winter month of January, I drive neighborhoods to work so it kinda sucks being cold and having to watch out for fker's in their tahoes & escalades pulling out in front of you with out looking.....But come saturday I'll be puttin the stock back in lol

1 more month of winter to go woo hoo here in Tx