2017 Lincoln MKZ AC blows cold then warm intermittently

[olliejones]

2017 Lincoln MKZ AC blows cold then warm intermittently – any ideas before I spend a fortune?

I'm hoping someone here has dealt with this. My 2017 MKZ has dual zone climate control, and the AC will blow ice cold for maybe 10-15 minutes, then suddenly start blowing warm air for no reason. If I turn the AC off for a few minutes and back on, it sometimes starts working again. There's no pattern to it, happens whether I'm driving or idling. I've checked the refrigerant level and it seems fine. I took it to a local shop and they said it could be a faulty expansion valve, a bad compressor clutch, or an intermittent electrical issue with the climate control module. They wanted to start replacing parts at my expense. I'm looking for a sharjah lincoln ac cooling service that actually has experience with these Lincolns and can do a proper diagnostic. Has anyone here had an intermittent AC issue on a Lincoln or Ford? What ended up being the problem? I'm worried it could be the compressor starting to fail. The car has 80k kilometers on it and I'd like to keep it. If you know a good AC specialist in Sharjah for American cars, please share. Thanks for any advice.

[orvillepoynder]

Cold for 10 to 15 minutes then suddenly warm with no pattern on an MKZ dual zone system points strongly toward a failing expansion valve that closes under thermal load. Intermittent electrical faults are possible but less common on these Lincolns.

[oswaldriddlesden]

A shop wanting to start replacing parts at your expense without a proper diagnosis on an intermittent fault is exactly the wrong approach. Intermittent AC issues need live data monitoring during the actual failure event, not guesswork.

[peregrinestandish]

Compressor clutch failure usually causes complete loss of cooling rather than a temporary warm period followed by recovery. The fact that turning it off and back on sometimes restores cooling suggests a pressure or thermal cutout issue rather than a mechanical fault.

[phineastrelawney]

Ford and Lincoln climate control modules on the MKZ have known intermittent sensor faults that only show up in live data during the failure. A specialist with proper IDS diagnostic access can capture that data during a test drive and identify the cause without guessing.

[quintinpollexfen]

Ford and Lincoln climate control modules on the MKZ have known intermittent sensor faults that only show up in live data during the failure. A specialist with proper IDS diagnostic access can capture that data during a test drive and identify the cause without guessing.