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AC works but compressor does not kick on


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carribejo
New User

Jan 23, 2014, 9:48 AM

Post #1 of 11 (2084 views)
AC works but compressor does not kick on Sign In

2006, Jeep Liberty, 3.7 - 42,000 miles. The air conditioner is working but after some time on, the air flow diminishes and not getting cold. When opened the hood the pipes around the compressor were iced up.
The compressor is not kicking on Unsure
HELP!
JP


Hammer Time
Ultimate Carjunky / Moderator
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Jan 23, 2014, 10:03 AM

Post #2 of 11 (2080 views)
Re: AC works but compressor does not kick on Sign In

I would advise you to change your user name or the spammers are going to have a field day with you.


Is the blower working properly and you are getting strong air flow out the vents?



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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.



carribejo
New User

Jan 23, 2014, 10:27 AM

Post #3 of 11 (2063 views)
Re: AC works but compressor does not kick on Sign In

Yes! Everything mentioned works....

P.s......changed username


Hammer Time
Ultimate Carjunky / Moderator
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Jan 23, 2014, 10:54 AM

Post #4 of 11 (2057 views)
Re: AC works but compressor does not kick on Sign In

It's not making a lot of sense. Everything you are describing points to a lack of air flow across the evaporator causing it to freeze
the lines. You could also have an internal restriction causing that but that's much less likely.



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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.



kev2
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Jan 23, 2014, 11:18 AM

Post #5 of 11 (2055 views)
Re: AC works but compressor does not kick on Sign In

  I am NOT sure owners manual will tell - is there a cabin/pollen air filter?

a scan for codes- maybe a code won't know till you check, then a set of AC gauges


Tom Greenleaf
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Jan 23, 2014, 12:19 PM

Post #6 of 11 (2049 views)
Re: AC works but compressor does not kick on Sign In

Might be my eyesight: You said it works at first, notice frost on lines and coolness plus airflow diminishes. Can also be anything already suggested by HT and KEV but that would also be common for evaporator icing frequently can be caused by low refrigerant charge from a leak.


Common leaks to these were the evaporator which is a job. Continued operation almost certainly will make the fix worse.


A good clue of evap icing is when you shut the vehicle off it would likely make a much larger puddle of water as it melts.


System should shut itself down by itself but most are late. Again all things mentioned checked, restriction, cabin air filter if applicable and I personally would check with a sniffer for refrigerant coming out panel vents. A device that beeps but can be wrong sniffing another something as more than refrigerant can piss those things off.


Most A/C is best left to those who have the equipment to test and do the work.


Off topic but it was 5 below zeroF here last night so it's amusing to discuss A/C for me right nowMad


T



(This post was edited by Discretesignals on Jan 23, 2014, 6:39 PM)


Hammer Time
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Jan 23, 2014, 12:26 PM

Post #7 of 11 (2043 views)
Re: AC works but compressor does not kick on Sign In

I missed the air flow part of his question but I specifically asked him about air flow.

I would say the cycling switch isn't cutting off when it's supposed to.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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.



Tom Greenleaf
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Jan 23, 2014, 4:32 PM

Post #8 of 11 (2031 views)
Re: AC works but compressor does not kick on Sign In

It probably is a CCOT set up. Who knows if LPCO is accurate or if adjustable was messed with?


Where the heck is it warm enough to need A/C now? Send it this way! Tom



Hammer Time
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Jan 23, 2014, 4:40 PM

Post #9 of 11 (2027 views)
Re: AC works but compressor does not kick on Sign In

He's in the Dominican Republic

It is a CCOT system so the cycling switch has to be bad.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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.



Tom Greenleaf
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Jan 23, 2014, 5:20 PM

Post #10 of 11 (2023 views)
Re: AC works but compressor does not kick on Sign In

High on the list. Pressures should show it, T



Discretesignals
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Jan 23, 2014, 6:42 PM

Post #11 of 11 (2017 views)
Re: AC works but compressor does not kick on Sign In

Or someone jumped the switch or ac relay to get the compressor to work because there is another issue that someone couldn't figure out. Unimpressed





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jan 23, 2014, 6:43 PM)






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