2004 ac help!!!!
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Junior Member
Joined: Jul 2016
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2004 ac help!!!!
2004 f150 lariat 5.4L
AC blows only cool sometimes, other times hot
Vent temps 75-80
todays test numbers:
ambient air - 95
Low side- 100
High side - 200
compresser clutch engaged and running during test
What would cause low pressure reading so high???
AC blows only cool sometimes, other times hot
Vent temps 75-80
todays test numbers:
ambient air - 95
Low side- 100
High side - 200
compresser clutch engaged and running during test
What would cause low pressure reading so high???
Last edited by Stone1968; Jul 29, 2016 at 06:07 PM.
Senior Member
Joined: Oct 2002
Posts: 7,295
Likes: 125
From: St. Louis (Out in the woods)
Worn out or weak compressor (leaky valves), for one possibility. There are others.
Shut the engine off and allow the readings to equalize. Record and report. Then start the engine back up and watch the gauges. Observe and report.
Shut the engine off and allow the readings to equalize. Record and report. Then start the engine back up and watch the gauges. Observe and report.