archer973
Well-Known Member
- Joined
- January 31, 2014
- Messages
- 112
- Reaction score
- 3
- City, State
- Mt. Vernon, WA
- Year, Model & Trim Level
- 1998 Ford Explorer XLT
Not surprisingly I've discovered a new problem with this vehicle. Just did a partial rebuild of the engine (see 1998 Explorer XLT Resurrection if you are interested). I'm sure I will be working out bugs on this for weeks to come.
Problem: Heater constantly blows hot air and heater control valve does not close. (I had my wife rotate the heater temp control while I lay under front of vehicle watching the valve). I tested the valve with a vacuum pump and it does operate, so I think it isn't the problem. Possibly I did not reconnect all the vacuum lines correctly.
Current routing of vacuum lines. There is a short (approx 9") L-shaped black vacuum line connected to the heater control valve. It is connected to a gray vacuum line that goes to the fire wall on passenger side underneath A/C stuff (that's a technical term). A black line comes out of firewall and goes to the vacuum reservoir. Another black line comes off vacuum reservoir and goes to top of engine where it connects to a red line that comes from the back of the intake manifold.
Questions:
1) Is this routing correct? If no...Help!
2) If I have correct routing, then how do I get into the heater controls to work on them?
3) Also if this routing is correct, why the short black line since the gray one is more than long enough to reach the heater control valve?
Problem: Heater constantly blows hot air and heater control valve does not close. (I had my wife rotate the heater temp control while I lay under front of vehicle watching the valve). I tested the valve with a vacuum pump and it does operate, so I think it isn't the problem. Possibly I did not reconnect all the vacuum lines correctly.
Current routing of vacuum lines. There is a short (approx 9") L-shaped black vacuum line connected to the heater control valve. It is connected to a gray vacuum line that goes to the fire wall on passenger side underneath A/C stuff (that's a technical term). A black line comes out of firewall and goes to the vacuum reservoir. Another black line comes off vacuum reservoir and goes to top of engine where it connects to a red line that comes from the back of the intake manifold.
Questions:
1) Is this routing correct? If no...Help!
2) If I have correct routing, then how do I get into the heater controls to work on them?
3) Also if this routing is correct, why the short black line since the gray one is more than long enough to reach the heater control valve?