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  #1  
Old 10-15-2010, 04:35 PM
trip02 trip02 is offline
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Default Air con. will not turn off

The air con. will not turn off when you put it on for just outside air to come in to cab?What do i have to do to fix it?You can here the air con. running all the time but when you put dail to off it will shut off when you put on for fresh air it comes back on? PLEASE NEED HELP WITH THIS!!!!!!!! THANKS TRIP02
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Old 10-15-2010, 04:42 PM
Solo V8 4G Solo V8 4G is offline
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Default Re: Air con. will not turn off

How long have you owned the ranger?
I have a 99 step side, reg cab and mine does the same. I believe it is suppose to do that. Reason why I say this is because if you look a electrical diagram from the HVAC control head, you will see that all the selections when you turn the dial to the right all have a power that is sent to the AC cycling switch, which then commands the Compressor on. The Dial in the middle is vacuum controlled and moves doors to redirect the air flow to the desired position. The only way you can get only fresh air into the cab would be by selecting the Panel position on the HVAC control head (1st one to the left). Hope this is able to help you, or at least guidance grasshoppa!
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Old 10-15-2010, 05:05 PM
FireRanger FireRanger is offline
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Default Re: Air con. will not turn off

The AC runs in all settings except panel only and floor only. Yes it is stupid. You can put a switch on the purple wire behind the HVAC panel to bypass this. Early 90's Rangers would run only in AC and defrost only settings.
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Old 10-15-2010, 05:32 PM
azgilamonster azgilamonster is offline
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Default Re: Air con. will not turn off

new mod coming up, a/c dash sw. oem ford style from earlier ford .I think I have one floating around
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Old 10-16-2010, 12:03 PM
trip02 trip02 is offline
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Default Re: Air con. will not turn off

Thank you for all your help JIM
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Old 10-17-2010, 08:42 AM
ericthehurt ericthehurt is offline
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Default Re: Air con. will not turn off

It's running for dehumidification. And if I'm not mistaken it's is also helping to make some heat via a refrigerant reversing valve. Like a Heat pump for a house.
Any time you've got air flowing over the glass the compressor will run so there isn't a build up of condensation. That's why older cars with heat but no A/C fog up even though they are running the heat, it's not enough to pull all the moisture from the air.
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Old 10-17-2010, 09:21 AM
FireRanger FireRanger is offline
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Default Re: Air con. will not turn off

I don't think there is any reversing on our AC system. Would be kinda neat though.

I agree that the AC running in the defrost mode is beneficial. I'm just one who prefers to have completely control. I don't always need that function, especially in the winter when its dry as a bone already.
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