2020 AC Not Blowing Cold

[ERNursebev72]

Hello There!

About a week ago, the battery died. I had it charged back up and it started fine. But now the AC is not blowing cold. It was working perfectly fine prior to that - blowing cold and hard air.

Issue:
Blowing and hearing compressor click. No cold air. Also a increase/decrease in fan speed on deceleration/acceleration.

Things checked:
Reset the BMS
Reset the SYNC system
Pulled out Fuse 32 that belongs to AC Clutch - intact

I am looking at the fuse diagram and don't see anything else that is obvious that could be AC.

I am a nurse so I can help bring people back to life, but I am also a woman. I prefer to try to figure these things out on my own before taking it to a mechanic and spending more than I need to.

It has 60K miles no previous issues.
Engine 3.5L GTDI

Ideas?

 

[99WhiteC5Coupe]

Hello There!

About a week ago, the battery died. I had it charged back up and it started fine. But now the AC is not blowing cold. It was working perfectly fine prior to that - blowing cold and hard air.

Issue:
Blowing and hearing compressor click. No cold air. Also a increase/decrease in fan speed on deceleration/acceleration.

Things checked:
Reset the BMS
Reset the SYNC system
Pulled out Fuse 32 that belongs to AC Clutch - intact

I am looking at the fuse diagram and don't see anything else that is obvious that could be AC.

I am a nurse so I can help bring people back to life, but I am also a woman. I prefer to try to figure these things out on my own before taking it to a mechanic and spending more than I need to.

It has 60K miles no previous issues.
Engine 3.5L GTDI

Ideas?

I’d bet you have a bad battery and/or loose or corroded battery terminals and connectors.

 

[ERNursebev72]

The battery is brand new - Dec 2023. Terminal and connectors clean.

 

[99WhiteC5Coupe]

The battery is brand new - Dec 2023. Terminal and connectors clean.

You reported that the battery died - there has to be a reason that happened.

It is not brand new, it is six months old and has died once.

 

[ERNursebev72]

It died because it got drained from a secondary battery onboard that runs a refrigerator that gets charged when running my vehicle from the alternator. I was supposed to turn it off when I parked for a week and forgot. So once the onboard battery died - it started running off the car battery and depleted it. Once it was jumped off, they are both working fine. The ford battery is only 6 months old and was purchased new.

 

[ERNursebev72]

If the battery is cranking now and the blower and compressor are running fine - how can the battery be the problem? Just trying to link it all together.

 

[bmk1]

Are you outside of warranty?

 

[VCFP153]

Hello There!

About a week ago, the battery died. I had it charged back up and it started fine. But now the AC is not blowing cold. It was working perfectly fine prior to that - blowing cold and hard air.

Issue:
Blowing and hearing compressor click. No cold air. Also a increase/decrease in fan speed on deceleration/acceleration.

Things checked:
Reset the BMS
Reset the SYNC system
Pulled out Fuse 32 that belongs to AC Clutch - intact

I am looking at the fuse diagram and don't see anything else that is obvious that could be AC.

I am a nurse so I can help bring people back to life, but I am also a woman. I prefer to try to figure these things out on my own before taking it to a mechanic and spending more than I need to.

It has 60K miles no previous issues.
Engine 3.5L GTDI

Ideas?

Interior temp sensor?

 

[99WhiteC5Coupe]

If the battery is cranking now and the blower and compressor are running fine - how can the battery be the problem? Just trying to link it all together.

I have seen many batteries damaged from being discharged fully, then jump started and / or charged.

Years ago, batteries lasted a long time and could be repeatedly discharged and recharged, and keep going. No longer.

You may have a damaged cell that is causing intermittent electrical issues. New vehicles (loaded with sensors, computers, modules, etc.) are very sensitive to battery issues.

I wish you luck. Keep us updated on what you determine.

 

[ERNursebev72]

Went to AutoZone and replaced the battery today. Still no cold air