2007 E550 blinking AC light
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Joined: Jan 2009
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From: V E G A S
1922 Ford Model T / no OBD
The earn the name "stealers" for a good reason.
You did nice job reading the sensors before. Can you repeat it?
Your previous main problem did show as low refrigerant, what could be faulty sensor, but now I want to see correct pressure.
You did nice job reading the sensors before. Can you repeat it?
Your previous main problem did show as low refrigerant, what could be faulty sensor, but now I want to see correct pressure.
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Joined: Jan 2016
Posts: 162
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From: Rochester NY
07 E550 4M - 11 Audi TT - 99 Expedition EB
Picking up the car this evening. I will order the pressure sensor again and make sure to get OEM this time in the event that was the issue. I suspect it's a wiring issue maybe going to the sensor but I'm not sure at this point.
MBWorld Fanatic!
Joined: Jan 2009
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From: V E G A S
1922 Ford Model T / no OBD
If you still have #8, what is refrigerant temperature showing 99, that sensor is bad.
I think pressure and temperature sensors are integrated, but how many wires had the sensor you replaced?
Your old pressure sensor did show some changes, what questions the dealer diagnosis.
I think pressure and temperature sensors are integrated, but how many wires had the sensor you replaced?
Your old pressure sensor did show some changes, what questions the dealer diagnosis.
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Joined: Jan 2016
Posts: 162
Likes: 8
From: Rochester NY
07 E550 4M - 11 Audi TT - 99 Expedition EB
I picked it up from the dealer only having paid for the diagnostic. The paperwork indicates that the code was for low pressure and pressure sensor fault or internal open in sensor. I declined any repairs but the AC is now working fine. I'm guessing they cleared the code and maybe that is why it's working. I'm not sure if this is a temporary fix or permanent but all seems to be well after several restarts and 20-30 miles.
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Joined: Jan 2009
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From: V E G A S
1922 Ford Model T / no OBD
That would confirm my previous suspicious that you had bad plug connection that trigger error codes who prevent AC from engaging.
The plug got moved, so connects again, error have been cleared and it is working again.
Even I don't mind things fixing themselves, the risk of them coming back is always in my head.
In your situation I still would repeat the sensors readouts. You had too much mess and not finding the reason is not giving good prediction.
The plug got moved, so connects again, error have been cleared and it is working again.
Even I don't mind things fixing themselves, the risk of them coming back is always in my head.
In your situation I still would repeat the sensors readouts. You had too much mess and not finding the reason is not giving good prediction.
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Joined: Jan 2016
Posts: 162
Likes: 8
From: Rochester NY
07 E550 4M - 11 Audi TT - 99 Expedition EB
As I mentioned, I did replace the pressure sensor. The code they pulled indicated the pressure sensor was bad. I'm under the impression that the new sensor did fix the problem but the code just needed to be cleared afterwards. The new sensor was a 3 wire which should be pressure, temperature and ground.
