Hi!
I have a '97 Mercury Sable w/Duratec V6. (104k miles)
On my way home from work last night I noticed my A/C wasn't cold, I looked at the temperature and it was almost to the redline.
Switching on the heater vents blew out cool air instead of hot.
The coolant was boiling off the header tank.
On getting it home, refilling the header tank and running it again, the same thing happened.
- Start engine.
- Heats up.
- Fans kick in.
- Coolant system appears pressurized.
- Temperature keeps rising.
Now, under the car where the thermostat housing is, the coolant pipe is hot on the engine/pump side of things, and on the radiator side, it's relatively cool.
Do you think the thermostat is stuck closed?
Also, the thermostat housing seems to have a smooth "dent" in it. Is this shape supposed to be there, or has a rock caused this?
Any help gratefully appreciated!!
Thanks!
Gordon.
I have a '97 Mercury Sable w/Duratec V6. (104k miles)
On my way home from work last night I noticed my A/C wasn't cold, I looked at the temperature and it was almost to the redline.
Switching on the heater vents blew out cool air instead of hot.
The coolant was boiling off the header tank.
On getting it home, refilling the header tank and running it again, the same thing happened.
- Start engine.
- Heats up.
- Fans kick in.
- Coolant system appears pressurized.
- Temperature keeps rising.
Now, under the car where the thermostat housing is, the coolant pipe is hot on the engine/pump side of things, and on the radiator side, it's relatively cool.
Do you think the thermostat is stuck closed?
Also, the thermostat housing seems to have a smooth "dent" in it. Is this shape supposed to be there, or has a rock caused this?
Any help gratefully appreciated!!
Thanks!
Gordon.