Air Conditioning
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Freshman User
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Air Conditioning
It is getting toasty in the great state of North Carolina and the last thing I need is fussy AC. Does anyone know the most common cause for the AC not blowing cold at idle? Blows cold under a load.
Cargo Master
Joined: Oct 2012
Posts: 3,072
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From: California
your condenser ain't working well. Mine doesn't work well at idle either. I replaced the fan clutch and that helped but it was still pretty low.
Try the fan clutch to get more air flow or install an electric fan on the front of your condenser. If that doesn't help, replace the condenser.
Try the fan clutch to get more air flow or install an electric fan on the front of your condenser. If that doesn't help, replace the condenser.
Cargo Master
Joined: Oct 2012
Posts: 3,072
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From: California
Also, you can put a shutoff valve on your heatercore hose. That will stop any heat from entering your heatercore, which will give you a slightly cooler HVAC system. Once outside temperatures gets cool nearer winter, pop your hood and open the shutoff valve to let the heat back in.
Laughing Gas
Joined: Dec 2003
Posts: 1,062
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From: Ford, WA
make sure the A/C system is charged properly.. could be low on refrigerant...may also be the condenser like others have mentioned..is your compressor the original? might be time for a new compressor, condenser, lines, etc.. pretty much an A/C rebuild..compressor is probably worn out.
Cargo Master
Joined: Oct 2012
Posts: 3,072
Likes: 48
From: California
make sure the A/C system is charged properly.. could be low on refrigerant...may also be the condenser like others have mentioned..is your compressor the original? might be time for a new compressor, condenser, lines, etc.. pretty much an A/C rebuild..compressor is probably worn out.
If it was a low charge, then he'd be having very short clutch intervals, as in every few seconds. If he is getting cold air at higher speeds, that tells me that his condenser is working only when it gets decent airflow.
One way to check is, turn the AC on while idling. wait for the air to blow warm, then use a garden hose to spray cold water liberally on the condenser. If the air blows colder, then your condenser is poorly functioning.
It's not necessarily a bad thing, you just need to realize that you won't get the kind of output at idling or slow speeds. Maybe charging it up a little might help.
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The compressor has been changed. I will try a few of the suggested "fixes". Thanks for all the advice.
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Cargo Master
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Mine works fine at idle. I charged it on the high side of the spec tho.
Sounds like condenser or low charge to me too.
I'm not sure if fords have it but gm low pressure switches have a screw in the plug to adjust so it comes on and off at certain pressures
Sounds like condenser or low charge to me too.
I'm not sure if fords have it but gm low pressure switches have a screw in the plug to adjust so it comes on and off at certain pressures
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