AC issue
Thread Starter
Junior Member
Joined: Aug 2024
Posts: 6
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AC issue
2018 f150 lariat, 5.0l
150,000 miles
Purchased from original owner 2 months ago.
AC working fine all summer, but after the first time towing with it last weekend the ac stopped working. I don't hear the compressor kicking on, dash air is blowing hot, cooing fans running at a low speed. Thought it needed a charge, but when I hook on the bottle and gauge on low side it spikes to almost 100psi and doesn't change. Tried replacing the cooling fan relay but no change. AC fuse is good. Looked thru hours of videos and threads but other than taking it into a mechanic I'm about out of answers.... any ideas of something a shade tree mechanic could try? Thanks Seth
150,000 miles
Purchased from original owner 2 months ago.
AC working fine all summer, but after the first time towing with it last weekend the ac stopped working. I don't hear the compressor kicking on, dash air is blowing hot, cooing fans running at a low speed. Thought it needed a charge, but when I hook on the bottle and gauge on low side it spikes to almost 100psi and doesn't change. Tried replacing the cooling fan relay but no change. AC fuse is good. Looked thru hours of videos and threads but other than taking it into a mechanic I'm about out of answers.... any ideas of something a shade tree mechanic could try? Thanks Seth
Senior Member
Joined: Nov 2013
Posts: 1,781
Likes: 524
From: Northwest Connecticut
2018 f150 lariat, 5.0l
150,000 miles
Purchased from original owner 2 months ago.
AC working fine all summer, but after the first time towing with it last weekend the ac stopped working. I don't hear the compressor kicking on, dash air is blowing hot, cooing fans running at a low speed. Thought it needed a charge, but when I hook on the bottle and gauge on low side it spikes to almost 100psi and doesn't change. Tried replacing the cooling fan relay but no change. AC fuse is good. Looked thru hours of videos and threads but other than taking it into a mechanic I'm about out of answers.... any ideas of something a shade tree mechanic could try? Thanks Seth
150,000 miles
Purchased from original owner 2 months ago.
AC working fine all summer, but after the first time towing with it last weekend the ac stopped working. I don't hear the compressor kicking on, dash air is blowing hot, cooing fans running at a low speed. Thought it needed a charge, but when I hook on the bottle and gauge on low side it spikes to almost 100psi and doesn't change. Tried replacing the cooling fan relay but no change. AC fuse is good. Looked thru hours of videos and threads but other than taking it into a mechanic I'm about out of answers.... any ideas of something a shade tree mechanic could try? Thanks Seth
Made a hell of loud whooshing/ screeching noise starting up... shut it off, restarted and all was quiet but no AC! lol Just blew warm/hot air and the compressor never kicked in. If it was a fuse don’t believe it would have made that loud noise! I have full coverage ESP so didn’t bother checking much except to see if the AC belt was on... which it was. Have an appointment next week and Ford can fix it and I won't have to deal with anything. This is the 3rd expensive repair that’s been needed in the past year so my ESP is paying off. It’s a low mileage truck with only 27,000 miles. My guess the compressor is gone because everything else works except no cool air. I’ll be driving my JKU for a while which is fine because at least the AC works good.
5 Year Member
Joined: Jan 2020
Posts: 559
Likes: 276
Unfortunately this past Friday my AC crapped out on my 2017 Lariat!! Made a hell of loud whooshing/ screeching noise starting up... shut it off, restarted and all was quiet but no AC! lol Just blew warm/hot air and the compressor never kicked in. If it was a fuse don’t believe it would have made that loud noise! I have full coverage ESP so didn’t bother checking much except to see if the AC belt was on... which it was. Have an appointment next week and Ford can fix it and I won't have to deal with anything. This is the 3rd expensive repair that’s been needed in the past year so my ESP is paying off. It’s a low mileage truck with only 27,000 miles. My guess the compressor is gone because everything else works except no cool air. I’ll be driving my JKU for a while which is fine because at least the AC works good.
Made a hell of loud whooshing/ screeching noise starting up... shut it off, restarted and all was quiet but no AC! lol Just blew warm/hot air and the compressor never kicked in. If it was a fuse don’t believe it would have made that loud noise! I have full coverage ESP so didn’t bother checking much except to see if the AC belt was on... which it was. Have an appointment next week and Ford can fix it and I won't have to deal with anything. This is the 3rd expensive repair that’s been needed in the past year so my ESP is paying off. It’s a low mileage truck with only 27,000 miles. My guess the compressor is gone because everything else works except no cool air. I’ll be driving my JKU for a while which is fine because at least the AC works good.
5 Year Member
Joined: Aug 2016
Posts: 227
Likes: 101
5 Year Member
Joined: May 2018
Posts: 2,449
Likes: 849
From: Southeast PA
2018 f150 lariat, 5.0l
150,000 miles
Purchased from original owner 2 months ago.
AC working fine all summer, but after the first time towing with it last weekend the ac stopped working. I don't hear the compressor kicking on, dash air is blowing hot, cooing fans running at a low speed. Thought it needed a charge, but when I hook on the bottle and gauge on low side it spikes to almost 100psi and doesn't change. Tried replacing the cooling fan relay but no change. AC fuse is good. Looked thru hours of videos and threads but other than taking it into a mechanic I'm about out of answers.... any ideas of something a shade tree mechanic could try? Thanks Seth
150,000 miles
Purchased from original owner 2 months ago.
AC working fine all summer, but after the first time towing with it last weekend the ac stopped working. I don't hear the compressor kicking on, dash air is blowing hot, cooing fans running at a low speed. Thought it needed a charge, but when I hook on the bottle and gauge on low side it spikes to almost 100psi and doesn't change. Tried replacing the cooling fan relay but no change. AC fuse is good. Looked thru hours of videos and threads but other than taking it into a mechanic I'm about out of answers.... any ideas of something a shade tree mechanic could try? Thanks Seth
Thread Starter
Junior Member
Joined: Aug 2024
Posts: 6
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Thanks for the link, I never did smell anything and my clutch turns freely. I will get under there today to check for power at the connector. Autozone got my money for the r1234yf bottle and gauge.
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Thread Starter
Junior Member
Joined: Aug 2024
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Just checked the plug and yes 14v at the plug but not engaging the clutch. Bad clutch? I hear no click or attempt to engage when I plug it in.
5 Year Member
Joined: May 2018
Posts: 2,449
Likes: 849
From: Southeast PA
Just putting this out there. Often times a control module will switch the return so the plug could have voltage and will only activate the clutch when there is a ground path.
