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Community and Q&A

Error Code for McQuay PTAC

cbut8995 | Posted in General Questions on

Ive been getting this error code on my mcquay PTAC PDAN.015. Seems the online says it means “Low Ambient Lockout – outdoor temperatuve below 35 degrees). Which is definitely not.

I live in a highrise in NYC and the ac compressor will shut off randomly but just have regular air blow out but randomly it will turn on and will work. Very frustrating since I live on a corner unit and there are a lot of windows and its been 90 degrees lately so its even hotter in here when theres so AC.

The building technician is always unhelpful and just tells me to replace it because then hell make around 2200 and replace it with an ice air model (direct replacement)

Anyone heard of this problem or know of an easy fix. Should I just replace the temperature sensor that is near the filter (its a long metal line with a thick bulb at the end). I can easily get that part and there is a local mcquay ptac service place nearby where I can buy the part when I switched out the board in the past.

Please help GBA community.

Thank you.

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  1. walta100 | | #1

    From only your description it sounds like the sensor for the outdoor air temp is inoperative and reporting a number low enough to make the computer shut down for low temp.

    It could be a broken wire for the sensor.


    1. cbut8995 | | #2

      Do you think its the wire thats on the indoor unit thats infront of the filter? It seems thats a temperature gauge wire unless thats not the one for outdoor temperature.

  2. walta100 | | #3

    Yes, I would expect at least one indoor and one outdoor temp sensor.

    The one you are describing sounds like an indoor temp sensor.


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