I have a 1990 HF with stock AC. When it gets over 90 outside the AC will not blow cold air at idle.

The AC fan does come on when I turn on the AC and the idle goes up about 200-300 PRM.

The AC blows cold if I am on the road but not in stop and go.

Does anyone have any ideas. My 1990 Jeep blows cold when it idles and I just can't believe that Honda made it this way so I feel there is something wrong.

TIA

Bob

 

is the ac fan working? Most likely it isnt

 

My 88 Std does this too. If its 90 degrees outside and I am stopped at a light for over a minute the air blows warm, and the rpms drop low too. I figured since the 62hp motor with 225k miles on it is still able to pull the car with the a/c on I should be happy.

 

Your refrigerant may be a little low or the belt may not have the proper tension / is worn out.

 

this is also a symptom of a faulty orifice tube(expansion valve). i replaced this part 'cause my air was getting warm at idle, too.

 

Good points everyone, I also had this problem, and it's due to the system being low on refrigerant. While sitting at a dead stop, there's no air forcing onto your condensor, so the a/c system won't blow as cold. Think of your condensor as a front mount intercooler for your a/c. Changing your dryer/reciever unit and discharge hose really benefit the system from getting heat flashes, good luck!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wiZCo &raquo;</TD></TR><TR><TD CLASS="quote">Your refrigerant may be a little low or the belt may not have the proper tension / is worn out.</TD></TR></TABLE>

bingo........ its most likely that your low of freon....

 

Sorry to jack your thread, but my question is suitable. My A/C is fully sealed works and is cold etc, but on hotter days I believe it could be colder. Now, I know store sells those cans to top up and would this be a simple solution? I was told that if our Honda systems arent charged perfectly to the ounce, they could not perform as well; correct?

 

^ This is correct, and like I said. Changing your dryer/reciever, really makes a great difference. This is what filters the refrigerant. Also, having new discharge hose that runs off the compressor plays a vital role, in keeping the a/c cool always. I live in South Florida, I've learned from my experience in the extreme heat, hahahaha

 

So i went to pick up a can of R134a and all they had was this r12 can that said it replaces freon and r134a. My system has been changed over, but would it be okay to mix a few ounces of this stuff in the can with my current charge?

 

r12 is the old style "freon" and is not legal for purchase by the general public. R12 and R134a also use different orifices to fill from. I dunno though, maybe one of these AC experts can tell you what's really going on with "mixing"

http://www.nichols.nu/tip306.htm