Excavator a/c

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Dougflas
Posts: 291
Joined: Mon Apr 18, 2016 6:10 pm

Re: Excavator a/c

Postby Dougflas » Wed May 06, 2020 1:02 pm

Remove the sensor from the evaporator and let it hang loose. Does the vent temps go lower? It is very possible the sensor is bad. Was the compressor new ?

Added info: I realize getting to the sensor may be a bear. Try this first. Run a wire from the compressor clutch connection to the inside of the cab. Connect a meter or small lamp to lead and ground. If the light stays on, it is probably not the sensor. You may not have a refrigeration issue but a control issue.
Al9
Posts: 77
Joined: Tue Mar 10, 2020 3:26 am

Re: Excavator a/c

Postby Al9 » Thu May 07, 2020 5:10 am

H8theheat wrote:now it will freeze u out in the morning 39-40f out the vent 10 psi low side and 170 ish high side in the morning 70 degrees outside...

As the day goes on the vent temp warms to 55-60 and it doesn't keep the cab cool...


This sounds like really bizarre behaviour for a bad evaporator temperature probe.

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