Lincoln Repair Questions? Ask a Mechanic for Answers ASAP
Welcome, I'm Chris (aka Moose) I prefer to work when others don't, I am here around lunch and after dinner till after midnight.
Are you able to achieve all blower motor speeds?
Are you able to use fresh and recirculated air normal/max AC?
When changing the interior temp does it respond?
After the AC has been on for 15 minutes, give me the outside temp, inside temp, and the temp coming out of the vents, guesstimate will be fine?
Do you have the same issue running it in auto settings and when in manual settings?
While running AC on, open the hood and grab the AC lines at the firewall are they freezing cold?
Thanks, ***** ***** is under the hood. Both of the evaporator lines at the firewall should be condensating and be near 30-40 degrees. At outside temps of 94 you should be getting a dash vent temp near 45-55 degrees. I need you to turn the AC on max, blower speed 2 and use a stick to hold the rpms at 1500. Then tell me the high and low side pressures max to min. This will tell me if its the compressor, orifice/expansion, contaminated freon, condenser temps, or a restriction. A weak compressor is what the symptoms point to so far.
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Low side is good, the high side is what we need to be more concerned with.
How would you like to proceed on this concern?
As long as your aware me posting an answer without diag is just an educated guess. I would not replace anything unless diag is done. I believe in your case the compressor is weak and not able to move enough freon to adequatly cool.
Debris in the system getting stuck.
Outside air temp
There are alot of things which can effect the AC system.
Hello again Chris here,