Question about 1999 Ford Expedition

1 Answer

My 2002 Expedition air conditioner will sometimes blow hot air and others cold air

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Guru:

    An expert who has written 7 tips or uploaded 3 video tips

  • Expert
  • 60 Answers

I would check the following possibilities:
1. Is compressor clutch working? - You need to do this when the ac is blowing hot air only - locate compressor drive pulley on engine - rubber belt wraps around it. Start engine and set to max ac. When the ac is blowing hot air, look at the center of the compressor drive pulley using a good flash light - watch it for a while, it should be spinning with the pulley - this means the compressor is engaged. If not, the compressor is not engaged. If your ac is blowing hot air, then the compressor should be engaged and running (trying to cool). If it is not engaged, then your compressor clutch is probably going out. Could be low voltage to clutch, but more likely the clutch is worn out and only working some of the time. Note: if working normally, the compressor clutch will engage and disengage in cycles- but the air should always be cold. If clutch is bad, compressor would need to be replaced (sold as one unit). This is tricky to diagnose and could take some time - you need to do it when ac is blowing hot air but set to max cooling.

2. Low on refrigerant or refrigerant has moisture in it? If your ac blows cold initially after being off for a while, then heats up, and continues to regularly cycle back and forth between hot and cool air, then the system may be low on refrigerant or the refrigerant may have moisture in it that is freezing and restricting refrigerant flow. An a/c shop can check refrigerant level and even replace refrigerant if moisture is suspected.

Could be other issues, but I would start with these.

Good luck

Posted on May 08, 2010

  • mitch May 08, 2010

    One other thing...if your compressor clutch is not engaging and you want to check for low voltage to the compressor clutch (item 1 above), then do the following...
    Locate wires coming from compressor clutch and trace to nearest plug
    that you can unplug. Turn on A/C to max cooling. If clutch not
    engaged (center of compressor drive pulley not spinning with pulley),
    unplug compressor clutch wires and use multimeter to check voltage
    going to compressor clutch. If voltage is around 12 volts or more,
    then clutch should be engaged when plugged in. Plug clutch wires back
    in (with motor still running and ac set to max). If clutch still not
    engaged, then clutch definitely bad because 12V signal should engage it.

×

2 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

lastech
  • 408 Answers

SOURCE: air conditioner blows hot cold and sometimes not at all why?

hello,seem you need to send your car to authorized dealer to scan the problem,maybe the solution is only synchronizing all the flap,ty

Posted on Apr 25, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2002 ford expedition


Check for codes & diagnose the various issues
Repair Shop ---I assume-- if you have to ask

Jul 20, 2013 | Cars & Trucks

1 Answer

The heater in my 2002 Expedition quit blowing out hot air. We flushed & filled the radiator, took the hoses off and ran water through the heater core and finally changed the thermostat. Still after...


two things that I have seen cause that problem is the blend door get stuck or stop working and the Heater Control Valve go bad and stop the hot coolent from going to the heater core. I hope this info helps

Dec 10, 2010 | 2002 Ford Expedition

1 Answer

On my 1997 Lincoln Mark VIII, the air conditioner and heater are


check the sensor in the dash near the controls looks like a tiny vent see if it has dust build up

Dec 08, 2009 | 1998 Lincoln Mark VIII

1 Answer

Air conditioner front is hot back is cold 1999 ford expedition


Check to see if cooling fans are working correctly,check for leaks,could be low on freon and check for debris between radiator and A/C condensor.

Aug 10, 2009 | 2002 Kia Sedona

1 Answer

Air conditioner on 2002 Pontiac blowing hot air, although freon is not low...also makes a clicking noise.


Take it to a garage and have them evacuate the system and refill with refrigerant. you have air and non condensibles in the refrigerant system.

Jun 02, 2009 | 2002 Pontiac Sunfire

1 Answer

Air conditioner blows hot cold and sometimes not at all why?


hello,seem you need to send your car to authorized dealer to scan the problem,maybe the solution is only synchronizing all the flap,ty

Apr 24, 2009 | 2000 Mercedes-Benz CLK

1 Answer

Ford Expedition 2002 Front Heater blows cold air below 45 MPH


impeller is made of plastic on teh water pump and its slipping and spinning on the shaft renew before weather warms up as engine will overheat

Dec 31, 2008 | 2002 Ford Expedition

Not finding what you are looking for?
1999 Ford Expedition Logo

1,287 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

75807 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22133 Answers

fordexpert

Level 3 Expert

5495 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...