heating problems

[hard_luck]

I have a 2.4 Liter Cavalier & I can't seem to get the heat to work. All that comes out is cold air. We've changed the thermostat and water pump. Is there a bleeder valve or something? If anyone has the answer....PLEASE let me know.

[planedude]

whats your temp guage at?

[Classicrocjunkie]

Next time you think about posting... try the search button.. here is a link to 58 posts concerning heating problems...

http://www.automotiveforums.com/vbul...earchid=713631

[hard_luck]

My temp usually runs around 195

[Mangoamerican]

crj, you joined 04-19-2004... "2004 is definitly the year, for the most stupid newbies joining AF, what will 2005 bring?" how do you know that this year most stupid newbies joined?

[Classicrocjunkie]

I had another account b4 this one that i started in 9/03..

#1. When you say "I have no heat", please differentiate between "Cold air blows out of my vents" or "There is no air blowing altogether".

#2. If the case is "I have no heat", the cheapest and easiest first step is to replace the thermostat. If the thermostat is stuck in the open position, it will not allow the coolant to reach a hot enough temperature to produce heat. This is also a good time to check condition of the coolant, and flush/refill the system if it is questionable.

#3. If the thermostat has been replaced, check next to make sure your temperature control cable has not come unhooked from the back of the HVAC controls. If this happens, the air vents inside the dash will not shift properly, and one or more settings may be operating at the same time, adversly affecting vent temperature.

#4. If the thermostat is verified to be good, the coolant in good shape, and the HVAC controls operating properly, odds are, the cause is a plugged heater core. In this case, the heater core must be replaced, and it isn't a half bad idea to replace the heater hoses, since you're in the area.

Note: These diagnostic procedures are only valid if the vehicle is NOT overheating. If the vehicle is overheating and there is no heat, there is a different set of problems, and a standard overheating diagnosis should be taken instead.