No Heat

[03powerstrokeuser]

IIRC a friend of mine bought an "03" used and someone had removed the vac solenoid from the inline hose for the heater. long story short, I finally found the long grey vac hose that went to the solenoid and connected it to a stub on the heater/ac box the one that has the blower attached. there is a nipple on the upper right hand side of the box. I plugged the vac stub into that nipple. HEAT. That was 8 years ago, he is still driving it. Hope this helps.

[bismic]

Jetboy - You are saying that the thermostat is different for an 03 and early 04 engine vs a mid 04 and later one? If so do you have part numbers?

My info says they are all the same: 3C3Z-8575-AA


boonedawg - any updates?

[dcovaleski]

03-07 all have the same thermostat.


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[jetboy44]

Just getting back to y'all. Freezing rain since yesterday, had to use the cold, cold truck to rescue a couple of friends! Bismic - Just telling you what the parts store gave me first before I pulled the old one and took it in for proper thermostat..lol. 03PS, gonna have a look per your suggestion and will report back. Want to be sure to thank all 3 of you for jumping in. First time user, y'all literally saved me from lighting the truck on fire, felt so alone w/all these issues!!!! Still pissed. Love the truck, hate the engine. Dropped over $4 G's since buying a year ago and now that it's averaging 10 - 20 degrees outside it's cold in that dang cab!

[OT]

J...My job 1 03 has only one grey vac. line going to box (like 03 saying) but also nothing in heater hoses like you found out. When you turn on heat, do you hear a "thump" kinda sound inside cab? Appears your 04 has 03 6L. Hope you get it fixed, know you do.

btw..I use little 12V heater/fan that helps on cold/icy mornings here, until I get cab heat.

[Ford06]

How cold is it outside? Try covering the radiator with cardboard to get the temp up. The thermostats fail open so this could be the problem. The engine temps should be 190+. Mine is 170 to 180 and I have the replacement thermometer ready to go when I get a weather window to replace it in.