heater is blowing cool air

[rdodger]

its about - 10 celcius here and my truck seems to be blowing cool air after being warmed up and driven for a bit . just wondering what this could be. thanx

[rdodger]

actually i just drove it to the store and it was blowing hot air then when i let it idle it cool down again . anyones help is greatly appreciated

[waterpukingf250]

sounds like it could be a head gasket or a thermostat

[rdodger]

anyone know where the thermostat is on the 04

[Lilpooh]

Originally Posted by rdodger

anyone know where the thermostat is on the 04

If you standing in front of the truck, the top radiator hose goes to it. Click this link, then click on the link posted, lots of info for you to get to know your motor.
PDF Tech manual

[HaysKSFirefighter]

Checked your coolant level lately? Low coolant = no or little heat

[rdodger]

thanx lilpooh , thats a huge help with learning about my truck

[lacooks]

I would go with the thermostat first... my truck was doing the exact same thing... little heat at idle then planty when driving... stuck thermo.... glad it stuck open..

[rdodger]

changed the therostat today and still same thing but i noticed that when i added fluid then went for a drive the level was down again when i got back and we had been checking for puddles . we took the cap off and the level went up in a bubbling manner , we then added more fluid thinking there was air in the sysyem . does anyone have any ideas , truck runs fine otherwise

[StevenHale]

I'm having about the same problem with my 04', changed the thermostat, added more antifreeze, added quite a bit and the fluid level never changed. Yet when i'm driving it the gauge reads Hot... and yet still no warm air, and its in the middle of winter lol. So yeah i'd greatly appreciate any help with this forum