Question about 2004 Ford F150

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No cool air comes out only hot air, What could be

When I turn on the AC in my truck it only blows hot air, I bought freon to put in it but it is full what else can I do?

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One of your vents are not working right.

Posted on May 15, 2010

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1 Answer

97 Plymouth Breeze won't blow cold air due to freon leak.


Your AC system is a closed system, so the fact you have to put more Freon in, means there is definitely a leak. I would check it out with a mechanic.

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The guage needs to read between 35/40 psi.. If its much higher you may be overfull, this causes it to not cool.. Fix by letting some freon out, then top it back to needed pressure.. If pressure is correct, it would be a clog in the system.. Usually an orafice tube or accumulator..good luck!

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My lincoln had the same issue, first it was the A/C compressor (original). I replaced it with another one (used) and worked for 1 month. Then back to hot air. "A/C experts" told me the compressor was out again. I took it to a Mexican auto shop, old building where the guy works alone and to my surprise...HE FOUND THE PROBLEM!! There was no freon leaks, the lines were freezing cold inside the motor, checked freon>>full. He then checked the filter. This filter is on the end of the line where it is crimped that allows the freon to flow thru. Im no mechanic so explaining what it is, forgive me. I can only show you...the line is silver ad in front of you by the radiator, and its the same tube that goes to where you plug it to add freon. There is a filter that was clogged up and prevented the freon from flowing. He removed all the freon, vacuumed out the system/line, and replaced the filter for less that $3.00. Added freon and his cost was $80.00. Thank God for honest people who work hard for a living. I buy the parts, he replaces and I continue to give him my business. Other expensive auto shops with fancy buildings/prices My Lincoln Mark LT now blows arctic cold air!!!

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1 Answer

2002 Chevy Express 1500. A/C Full of freon, fan blows hot air and not cold at all. What can it be?


check all fuses first. does ac compressor come on? if not, unplug pressure switch in low pressure line near where you add freon and short across pigtail. comes on now and cools? replace switch. if not plug back in. apply manual voltage to ac compressor. comes on and cools? if not compressor or clutch is bad. if it does, check ac relay. that's about all you can do with limited tools in the driveway. if no progress has been made, time to take it to the pros.

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1 Answer

AC cools then blows hot air, tempature needle goes up & down


Sounds like the thermostat is trying to stick,and is causing the engine to over heat,therefore condenser is not cooling the freon down enough to cool.Have the thermostat changed and the cooling system bled out,this is most likely the cause.

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you may have a leak in your system or the ac condensor could be bad.

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1 Answer

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did you cheked if there is enough refrigrant ( freon ) in your tubes by measuring the pressure . if there is you may need to check your condensor its may be clogged and not letting enough air comes through to cool the refrigran

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1 Answer

Ac compressor does not turn on when car has been sitting & it's hot outside. Works fine in the morning.


either the freon charge is about 1/3 low, or the expansion valve needs to be replaced. Freon is getting into the evaporator, but not in great enough volume to cool the air unless it is coming in cool to start with. check your ac charge, and if it is full, then have it emptied, change out the expansion valve, and recharge it

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1 Answer

Ac blows cool than hot seems like a confused system


as it is a general motors product i beleive the relay is right on the compressor. check fuses and any other relays

Robert

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