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joemac
Novice
May 28, 2010, 7:58 AM
Post #1 of 8
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96 Crown Vic 95K miles blows hot air however, when battery is disconnected for 20-30 minutes the A/C and auto temp will work fine for 2-3 days. the blend door works and the blower works. is there a sensor or relay that might be shorting out or overheating?
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Hammer Time
Ultimate Carjunky
/ Moderator
May 28, 2010, 8:01 AM
Post #2 of 8
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Re: A/C a weekly fix
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When and how did you you check the blend door? What it blowing hot when you did that?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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joemac
Novice
May 28, 2010, 8:11 AM
Post #3 of 8
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Re: A/C a weekly fix
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when it blows hot air I change the settings from floor to blend to defrost and they change just as they do when the A/C is running cold air
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joemac
Novice
May 28, 2010, 8:15 AM
Post #4 of 8
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Re: A/C a weekly fix
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also, it doesn't work unless i remove both posts on battery and if disconnected for 20-30min.
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Hammer Time
Ultimate Carjunky
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May 28, 2010, 8:30 AM
Post #5 of 8
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Re: A/C a weekly fix
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If the temp of the air is going to hot and not just ambient temp, the blend door is the only thing that can do that. If it's just losing the cold air but not switching to heat, that's another story. Also it makes absolutely no difference to remove a second battery cable once one is removed. The circuit is already open. It can't get any more open.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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joemac
Novice
May 28, 2010, 3:12 PM
Post #6 of 8
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Re: A/C a weekly fix
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reading later questions , what does a thermistor do? I do have auto temp control. could that cause my problem? thanks for all info
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Hammer Time
Ultimate Carjunky
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May 28, 2010, 3:20 PM
Post #7 of 8
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Re: A/C a weekly fix
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A thermistor is a temperature sensor. That or many other things can cause your problem. It would need to be diagnosed correctly.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
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May 30, 2010, 7:53 AM
Post #8 of 8
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Re: A/C a weekly fix
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Not sure but can't say if there were changes for 1996 and up. This should use just a LPCO (low pressure cut out switch.) It's possible to use both and the thermistors if sensing low pressures can cut out till reset via the battery disconnect but I know that for GM products more than Fords. Even so performance should be less than perfect if that was tripping it off and not coming on anytime soon. Sometimes faulty but many had plain faulty relays well marked under the hood and many had wide clutch air gaps you can adjust in 5 minutes if excessive with no real special tools. If when down you tap on outer plate when it should be engaged but not and all works that would be it. Relay could be swapped but worth buying a new one at a Ford dealer - used to be dirt cheap - 5-6 bucks and should be same as fuel pump and others in same box. Switch is used so it shouldn't utilize a thermistor too. It's on the accumulator if parts look up was right?? Who knows for certain what was done exactly? Would look like this if a normal CCOT system,
T
(This post was edited by Tom Greenleaf on May 30, 2010, 8:05 AM)
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