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I at was getting an ac off fault which is P118 fault so I…

Customer Question
I at was getting...

I at was getting an ac off fault which is P118 fault so I replaced the thermostat before I replaced it the temp gauge would read nothing meaning my tstat was open now it goes to almost all the way could it be an air lock in the system if so how do I fix it

Mechanic's Assistant: Have you checked the Freon level?

Would that be part of it

Mechanic's Assistant: What is the model/year of your Chevy?

2008 Colorado 3.7 5cyl.

Mechanic's Assistant: Are you fixing your Colorado yourself? What have you tried so far?

Yes

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

I replaced the tstat

Submitted: 11 months ago.Category: Chevy
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Answered in 55 minutes by:
9/16/2017
Chevy Mechanic: Dan, Technician replied 11 months ago
Dan
Dan, Technician
Category: Chevy
Satisfied Customers: 26,028
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Chevy Mechanic: Dan, Technician replied 11 months ago

Here are filling/bleeding instructions. Follow procedure and air should work itself out, let me know if you have questions. Thanks.

-

Cooling System Bleed Procedures

Procedure

  1. Slowly fill the cooling system with a 50/50 coolant mixture.
  2. Install the coolant pressure cap.
  3. Start the engine.
  4. Run the engine at 2,000-2,500 RPM until the engine reaches normal operating temperature.
  5. Allow the engine to idle for 3 minutes.
  6. Shut off the engine and allow to cool.
  7. Top off the coolant as necessary.
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