It could be several things. I first would remove the heater hoses and flush out the heater core to see if it is clogged. If it is open and water is flowing free go ahead and plug the ends of your hoses and start the engine and turn on your hot water valve. See if it is controlling the flow of waterfrom the hose. From full flow to no flow when changing the temp. control. If the controls are working ok hook up the heater hoses and make sure you have the right hose on the right pipe. After the engine is up to full operating temp set temp. control to hot, feel the hoses and see if they are hot. If the water is flowing you should not be able to hold on to the hose very long. Remember 180 degrees. Now check your heater / defroster controls. Does the defroster have hot air coming out. Then check the heater outlets. If they are not working you will have to start checking to see if the vacuum lines are ok. Under the hood first, then under the dash. Watch each door as you change the settings. Try This first. Gary Barker Bill Leahy wrote: >well i found the outside air vent was wide open in my 62 sport and >freezing me out. > > i now have it closed...and then i put in a new 180 thermostat...and >the heater still only blows cool to warm air. > >anyone with an idea what to do next? > >bill in kennewick washington > > > >To send a message to this group, send an email to: >Chrysler300@xxxxxxxxxxxxxxx > >For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm >Yahoo! Groups Links > > > > > > > > > > > ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/8LmulB/TM --------------------------------------------------------------------~-> To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/