03 Navigator Cold Weather Operation
Just got a 03 Navigator (project) with 5.4 4 valve engine with 116K that suspension and some options were inop. After shop diagnosed and replaced fuse box, air compressor relay and door switch the air...
Forum Discussion
I'm almost certain you have a stuck thermostat. When you swap it, be sure to get the ultra, super, or premium version of whatever t-stat you get. The standard flavor often does't last long, and many of those are bad even out of the box. The difference is less than $10 usually.
BTW - the coolant in your Navi I believe is spec'd for flushing every 150,000 or 10 years, so it's probably a good idea to go ahead and get some new stuff in there when you do the T-stat.
BTW - the coolant in your Navi I believe is spec'd for flushing every 150,000 or 10 years, so it's probably a good idea to go ahead and get some new stuff in there when you do the T-stat.
