thermostat?

[NCG8R]

1996 Explorer, V8, 110,000 mi
This morning I couldn't get any heat from my heater until 10 minutes after engine reached operating temp. Fan worked but no hot air. I suspect the heater valve that directs the water to the heater core. Once the heat started blowing, the temp gauge would float and read cooler at a stop and normal while going. Never approached the max but floated. Would you guess thermostat needs replacing? I can see this for the floating problem but am uncertain about the lack of heat problem. Any help welcome.

 

[exploded99]

Actually it sounds like your thermostst is not closing properly. So it takes a long time to warm up (no heat). That is probably also causing the temp swings while driving.

So, I would put a thermostat in it. You should also replace the little bypass hose next to it. I'm guessing all will be ok when thats done.

 

[TheJMan]

I'll second the recommendation to replace the bypass hose. I had that little sucker burst on me one time, and I was lucky I made it home, the engine was running around 250 and steam was pouring from the engine bay. Definitely replace that every time you do the t-stat.

I recommend using the Motorcraft part, I've had no problems with M/C t-stats in two Ford vehicles.

 

[purehypeballer]

Stant ones are good too!

i had the same issues and toss one in and bam!!! all fixed!

joel

 

[EMG7895]

Replace the t stat and use preferably not with a motorcraft one.

 

[piedmacaw]

I have same issue with my 96 limted 4.0, my question is what stat should I use to replace the old one. There are several choices, different temps and one called superstat. Is the superstat a fail safe & if not should I still use it? Would it help to drill a hole in it if its not fail safe? Thanks!