Jump to content
  • Welcome To Mopar1973Man.Com

    We can see that your guest and been lurking about. When you register on the Mopar1973Man.Com site you'll be able to interact with all the other members. This is the most friendliest Cummins forum you'll ever join. Take the time right now and  REGISTER  on the Mopar1973Man.Com this will open up many more options and functions on the website. Everyone is very friendly and helpful just ask questions and everyone will help you out the best they can. 

Sign in to follow this  
Old_Sparky

A/C compressor cycles when not selected

Recommended Posts

While changing the oil on my truck last night, I noticed that water was draining from the A/C hose from the firewall. I have not had the A/C on for the last month. I have the dash selector set to floor or floor/vent. With the engine running, I watched the A/C compressor cycle on and off. What would cause the A/C compressor to cycle on and off when the A/C is not selected?

Share this post


Link to post
Share on other sites
The A/C cycles when you have the defrost selected. This way the fluid inside gets circulated and the pump is lubricated. This is a normal operation for the A/C unit.

Share this post


Link to post
Share on other sites

The problem is I do not have defrost selected. I am only using the floor selection or the floor/vent selection. In either of these, the A/C should not be running as far as I know. I am wrong on this?

Share this post


Link to post
Share on other sites

I think its normal in the dual position. Mine cycles the compressor when its in the dual floor / vent position also.Change it to floor or vent alone and it does not cycle. My 02 and 05 are both the same way.

  • Like 1

Share this post


Link to post
Share on other sites

Wild and Free, this makes more sense. Not sure why the factory decided to do it this way and not put the snow flake on the dash for us.

Share this post


Link to post
Share on other sites

My 98 ranger did the same thing when on face/floor..

I haven't noticed it on my 05, but also have listened/looked for it.

I wonder if the duty cycle is difference with the a/c switch on.

--- Update to the previous post...

Well I pulled this from my 05 Owners Manual.. It appears it only operates in the mix/defrost with the a/c off. My Ford manual specifially stated which levels it worked it.

NOTE:

The air conditioning compressor operates in

both Mix and Defrost or a blend of these modes, even if

the A/C button has not been pressed. This dehumidifies

the air to help dry the windshield.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...