2000 Grand Marquis Heater Valve Location - Ford Forums

davepasch · 10-17-2009, 12:50

Not in book. Anyone know where it is located?
Thanks Dave

**rtg143** · 10-17-2009, 20:41

There is no heater valve. Water always runs through the heater core. The blend door controls the heat felt inside the cabin.

davepasch · 10-17-2009, 23:14

Anyone have a pic of this?
I have a heater stuck on.
Bad or stuck controler.
Thanks for the quick response
Dave

**rtg143** · 10-18-2009, 08:57

It's located on top of the plenum under the dash. To replace it you have to pull the instrument panel out. What exactly is the sytem doing? Can you change it to defrost, floor, etc? Is it manual or EATC?

**jwko** · 10-18-2009, 11:48

It's not exactly the diagram you are needing but all I could find.

davepasch · 10-18-2009, 16:18

The ac is properly charged and pump is running.
Blows 120 degrees out the vents in any position on the digital controler. Ac or fresh air.
All fuses and relays have been checked.
Vacuumed oak leaves out of the windshield wiper drains.
Need to open the ac heater box inside the car and see stuck flap or bad controler.
Anyone have any experience in this one?
Thanks Dave

**rtg143** · 10-18-2009, 16:27

Fuse #5 under the dash is good?

davepasch · 10-20-2009, 08:52

Initially I checked all fuses inside the car and under the hood.
Checked all relays too.
The woman has the car I cannot recheck now.
Dave

davepasch · 10-24-2009, 17:59

Did the job.
Autozone had manual blender motor.
Automatic heater blender motor $71 dealer only.
If flap was bad $200. dealer heater box.
Blender motor installed in about 2 1/2 hours complete.
Loosened whole dash pulled dash back about 8 inches to install.
Thanks for all the help.
Dave

**rtg143** · 10-24-2009, 21:16

Glad to hear you were successful. Thanks for letting us know. You did it very fast. Sounds like you know what you're doing.