I have an 07 xlt with the 5.4 and 103000 miles and today i had no heat. Its been in the single digits this week too. Can't figure it out

 

That does suck. Hate to hear that man! Hope you're able to get it fixed soon! Wish I could help!

EDIT: at least you didn't have a tire blow out this morning

 

whats the engine temp when you have no heat ??

 

It was up to 212 deg on my edge tuner and still blew gold air

 

Check your thermostat. I would just change it anyways. They are inexpensive and easy to do on our years. Usually if you have no heat it means the thermostat because the coolant is not circulating and not able to reach the heater core.

 

Ok thanks I'll try that and see what happens. I hope thats the prob.

 

Should be. My truck doesn't run hotter then 192 even when towing. My sister had a bad thermostat and it was doing the exact thing.

 

Just make sure that you watch your heater core for leaking also. Could also be something stopping up.

 

if we start going through heater cores already im gonna **** a chicken.

 

check to see if your blend door is working also...engine temp 212 with that cold of outside temp sounds like what they told you though...T-Stat