Jump to content
Sign in to follow this  
mohok

A/C Problem

Recommended Posts

My A/C, when left on after I cut the the truck off and restart it, sometimes resumes in the defrost mode and then after moving the truck, it will return to the normal mode for Max Air. It will not return to the Max Air mode by just rotating the dial. Please advise.

Share this post


Link to post
Share on other sites

I would start out checking for vacuum leaks or vacuum line damage. Fairly common.

Yep, start at the vacuum pump and follow the line to see where it is cracked. The vacuum controls ALWAYS 'default' to defrost as a safety measure.

Share this post


Link to post
Share on other sites

Thanks. I'm traveling and have little or no internet. I found the leak in a connection and should be able to replace the part myself. I used some electrical tape on it and it has worked since. Was relieved to find out it should be a low cost fix as I'm on the road and have experienced some triple digit temps the past few weeks. I will be in Iowa for the next six weeks or so.

I would start out checking for vacuum leaks or vacuum line damage. Fairly common.

Share this post


Link to post
Share on other sites

Can someone help me identify the part I need to replace. It is the connection on the line that runs from the lower left front side of the engine to the connection on the upper part of the outside firewall located about middle way of the firewall. ~~

Share this post


Link to post
Share on other sites

Mohok,

You may just want to stop by a "real" parts store. The guys at the box stores won't know. IIRC the tubing is 5/32". You can replace broken parts of the tubing with 5/32" vacuum hose. The older guys will know exactly what will slip on and hold vacuum. This will definitely get you by.

If all else fails, see if there is a Cummins dealer near you. They should have that part. I know they supplied the connection to the vacuum pump, and possibly the next part also.

GL

Hag

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  



×