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

83,175

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

1 out of 1 people think this is helpful.
Best Answer
20

All modes

2 out of 2 people think this is helpful.
58,945

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

83,175

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 out of 2 people think this is helpful.
120

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.

83,175

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

Add photo

Related Questions

Crown Victoria

Looking for a Used Crown Victoria in your area?

CarGurus has 1,394 nationwide Crown Victoria listings starting at $1,700.

ZIP:

Search Ford Crown Victoria Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Ford Crown Victoria Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 1,650
#2 Tom Demyan
Tom Demyan
Reputation 850
#3 FordNut
FordNut
Reputation 810
View All

Related Models For Sale

Used Mercury Grand Marquis
25 Great Deals out of 2,148 listings starting at $1,985
Used Dodge Charger
474 Great Deals out of 30,158 listings starting at $2,275
Used Lincoln Town Car
36 Great Deals out of 2,144 listings starting at $1,995
Used Chevrolet Impala
891 Great Deals out of 35,196 listings starting at $1,700
Used Ford Taurus
302 Great Deals out of 21,176 listings starting at $1,500
Used Ford Mustang
549 Great Deals out of 42,544 listings starting at $1,699
Used Ford F-150
3,031 Great Deals out of 207,234 listings starting at $1,990
Used Ford Explorer
1,110 Great Deals out of 71,357 listings starting at $799
Used Chevrolet Tahoe
859 Great Deals out of 27,932 listings starting at $1,700
Used Honda Accord
992 Great Deals out of 74,858 listings starting at $899
Used Dodge Challenger
334 Great Deals out of 25,207 listings starting at $7,988
Used Chrysler 300
471 Great Deals out of 22,565 listings starting at $1,000

Used Cars For Sale

2008 Ford Crown Victoria Base For Sale
5 listings starting at $1,700