H3 Still working out some bugs!!!

[tgomes78]

Well my h3 runs awesome after swapping the motor and a few other minor things. For some reason the ac clutch does not engage. I checked/ added pressure but something else is wrong with it. All wiring seems to be correct. It's odd because I used most of the parts off my old motor less sensors and gaskets. It worked before the motor blew.


Sent from my iPhone using Tapatalk

 

[Happy Hummer]

Hmmm. Have you got power making it to it? Have you physically verified that the unit is engaging? Could be a hi/low cut of switch....

But we'll need more information as to what exactly it is and isn't doing.

 

[alrock]

How did you check it and/or add refrigerant?

 

[Burtor]

The service manual has a list of requirements to get the AC compressor relay to kick on.
Try and run down this list and make sure you're passing all of these.

The air conditioning (A/C) compressor clutch will not engage under the following conditions:

• The A/C high side line pressure is over 2 413 kPa (350 psi) .
• Throttle angle is at 100 percent .
• Engine speed is more than 5,500 RPM .
• Engine coolant temperature (ECT) is more than 123°C (253°F) .
• Evaporator core temperature is less than 0°C (32°F) .
• The powertrain control module (PCM) minimum OFF time to engage the compressor is 7-9 seconds . The scan tool, A/C Relay Command Delay, body control module (BCM) Inputs data list, can validate this.
• The evaporator temperature sensor is normally closed. The evaporator temperature sensor opens at 0°C (32°F) .

Good luck! Hope you find out what the issue is.