Question about 2003 Ford Focus

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A/c compressor will come on on low and not blow air. It will sometimes come on and blow in the 3rd fan setting.

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Replace fan switch unit as these wear out.

Posted on Apr 29, 2010

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91 towncar a c blows cold sometimes


Let me start by saying the people who answer questions on this site are volunteers, not employees.
And this is the first time I have seen this question.
Now, here are some of the possible reasons for cold air sometimes.
The blend doors that control air flow and the heater are vac operated. You may have a vac leak or a blend door not working correctly.
If the problem happens depending on engine speed, the fan clutch may be faulty and not pulling enough air thru the radiator.
If the problem is because the compressor stops running, you would need to check for voltage at the compressor and the relay. You could also have a low or high pressure switch that is coming and going.

Jul 16, 2012 | 1991 Lincoln Town Car

1 Answer

Fan blows hot air, compressor does not start..i replaced fuses..what do i do now?


check relays other then that must hook up to manifold set to see if any freon left in system
or to low to engaged compressor

Apr 02, 2011 | 2003 Kia Sedona

1 Answer

Air conditioner speratic cold


See if the gauge goes to 100 ,look to see if the clutch on the ac compressor is cutting off,and then back on.

Jul 11, 2010 | Hyundai Motor 2004 Sonata

1 Answer

A/c and heater problem A/C will sometimes blow cold air for about 20 seconds then start blowing warm air. Then when using the heater it will blow warm air for about 20 seconds or so then start blowing cool...


sounds like you may have developed a leak in the system, when the pressure in the system is low it will cause the compressor to cycle off and on. Have you tried to charge the system? P.S. Dont know if you are aware but hte compressor kicks on when the heat is on as well as he AC.I hope this helps and good luck !!

May 10, 2010 | 2006 Chevrolet Aveo

1 Answer

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


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

May 07, 2010 | 1999 Ford Expedition

2 Answers

1999 odyssey blows some cold air when moving


It could be a number of things. Check to see if the clutch is turning on the compressor. If it keeps turning on and off (cycling) it is low on freon. Is the condenser clean and free of bugs and road debris? Is the radiator fan coming on? If not that could explain why it is cold while driving, but hot while idling. Most all vehicles will blow colder on the AC when driving down the road because you are getting cooler air through the condenser. Hooking up a set of gauges to the vehicle will tell you best what is going on. Basic rule of thumb is: low side should be in the 30-40 lb range while running and the high side should be around 100 lbs higher than the ambient air temperature. Anything drastically different means you have a problem.

Jun 30, 2009 | 1999 Honda Odyssey

1 Answer

Air conditioner is not blowing cool air, but fan still blows


check the compressor with the ac running and make sure the compressor is kicking in and out in not the compressor might be bad or te clutch on te front of te compressor, sometimes u can get to much freon in them to i did it ounce

May 30, 2009 | 1998 Cadillac Eldorado

1 Answer

Instrument panel is not working and Air conditioning is not cold.


Have you checked how low the freon is in the compressor of the air conditioner? Sometimes if it is too low the compressor won't pick it up and therefore, the fan won't work. on any speed and if it does it won't blow cool. Hope this helps.

Jul 22, 2008 | 1999 Pontiac Grand Am GT

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