Whn air is on, cold air only comes thru window defroster

20

Asked by May 15, 2015 at 08:08 PM about the 2007 Ford Crown Victoria Base

Question type: Maintenance & Repair

when running air condition, cold air only come out thru the window defroster area, air will
not come out of vents, and the amount of air coming thru the window defroster is not very
heavy.

7 Answers

118,685

Does this only happen with the A/C or in all modes?

1 people found this helpful.
Best Answer Mark helpful
20

All modes

2 people found this helpful.
80,395

Sounds like the system has lost vacuum. Check for a broken or disconnected vacuum hose coming out of the firewall in the engine compartment. Then look around the top of the engine to find where it needs to be hooked up. HTH. -Jim

118,685

On a Ford the defrost mode is default, so if you loose vacuum it will go to defrost. The most common loss is a broken vacuum supply line from the engine, then the control valve leaking so it can't send vacuum to the vacuum motor that controls the mode door of the one selected. So that is the place to start.

2 people found this helpful.
210

Heater core or blower motor. Check to see if the fan on the radiator is cutting in and out, check antifreeze up to level and check to see if the air conditioner is running. Sometimes when switching the heat the buttons stick. Clean thoroughly! You tube has video to show what to do. See service if none of these things help. No thermostat can cause this. Some people remove the thermostats for whatever reasons thinking it will run like the older carburetor models this can harm the vehicle. Troubleshoot with manual suggestions found at the front of the Hanes manual for each year of vehicle.

All the vacuum hoses are connected. Still air only comes thru the defrost. What's next.

118,685

So next start checking the mode switch, see if it is supplying vacuum to each servo motor that you select by turning the knob, then check to make sure that the servo motors are responding to the supplied vacuum, so if the mode switch is not sending vacuum then it needs replaced, if it is sending vacuum and one or more servos don't respond then those need replaced.

Your Answer:

Crown Victoria

Looking for a Used Crown Victoria in your area?

CarGurus has 747 nationwide Crown Victoria listings starting at $2,995.

ZIP:

Ford Crown Victoria Experts

  • #1
    Tracy Hooks
    Reputation
    2,000
  • #2
    Tom Demyan
    Reputation
    1,210
  • #3
    Bob Beaman
    Reputation
    910
View All

Related Models For Sale

Used Mercury Grand Marquis
18 Great Deals out of 1,296 listings starting at $1,196
Used Dodge Charger
349 Great Deals out of 30,279 listings starting at $2,000
Used Ford Taurus
205 Great Deals out of 16,251 listings starting at $500
Used Ford Mustang
308 Great Deals out of 40,433 listings starting at $1,000
Used Ford Explorer
933 Great Deals out of 71,663 listings starting at $695
Used Lincoln Town Car
31 Great Deals out of 1,455 listings starting at $899
Used Chevrolet Impala
517 Great Deals out of 26,173 listings starting at $995
Used Ford F-150
2,355 Great Deals out of 199,739 listings starting at $1,300
Used Chevrolet Tahoe
666 Great Deals out of 38,499 listings starting at $995
Used Honda Accord
719 Great Deals out of 103,450 listings starting at $849
Used Dodge Challenger
175 Great Deals out of 22,564 listings starting at $7,495
Used Toyota Camry
882 Great Deals out of 72,153 listings starting at $1,000

Used Cars For Sale

2008 Ford Crown Victoria Base For Sale
4 listings starting at $4,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.