a/c not blowing cold air, '99 Intrepid 3.2L - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
Reply
 
LinkBack Thread Tools Rate Thread Display Modes
post #1 of 29 (permalink) Old 06-03-2017, 01:02 PM Thread Starter
Intrepid Newbie
 
Join Date: May 2009
Location: USA
Posts: 47
Feedback: 0 / 0%
 
a/c not blowing cold air, '99 Intrepid 3.2L

A/C was working normally last fall, turned it on for the first time this year a few days ago and no cold air.

Air flow is strong and the compressor is turning, belt seems the right tension. No obvious problems with hoses.
Anything else simple I can check? Car's maybe a year away from being sold or scrapped so I won't be replacing
anything expensive.

Thought of trying one of those ~ $20 r134/seal kits.
aerotive is offline  
Sponsored Links
Advertisement
 
post #2 of 29 (permalink) Old 06-03-2017, 10:22 PM
Intrepid Pro
 
Join Date: Feb 2002
Location: Virginia, U.S.
Posts: 14,722
Feedback: 4 / 83%
                     
If the compressor is running, that means that at least there is *some* refrigerant in the system (the pressure transducer won't let the compressor come on if the pressure is very low).

Are your radiator fans working? If they aren't, you won't get much cooling with the car sitting still, but would get it when moving down the road at hiway speeds.

Another cause could be the blend door is not working. It determines the temperature of the air coming out of your vents by proportioning how much of the air goes thru the fins of your a.c. evaporator fins and how much air bypasses the evaporator.

Try putting the system thru a self diagnostics. It will do two things: If there is anything wrong with one of the door actuators, it will give you a code telling you that. If a door got out of calibration but is still functioning, it will recalibrate it. Here's a How-To on the diagnostics: How to retrieve ATC and MTC trouble codes

Let us know what you determine from the diagnostics and checking to see if you radiator fans are working.


'98 LXi - Later Concorde gages (black w/ chrome rings)/'99 LX - LHS gages (white) - HIR bulbs
peva is offline  
post #3 of 29 (permalink) Old 06-03-2017, 11:26 PM Thread Starter
Intrepid Newbie
 
Join Date: May 2009
Location: USA
Posts: 47
Feedback: 0 / 0%
 
Thank you had no idea that could be done.

Seemed to cycle through the test properly, no codes at the end. Ran it three times with the same result.

It's auto climate control if that matters.

Re radiator fans, just checked and they are not running with a cold engine start, also don't run with the a/c on. Should they turn on immediately with this car?
I replaced the entire radiator fan assembly myself almost two years ago.

Last edited by aerotive; 06-03-2017 at 11:38 PM.
aerotive is offline  
 
post #4 of 29 (permalink) Old 06-03-2017, 11:39 PM
Intrepid Pro
 
Join Date: Feb 2002
Location: Virginia, U.S.
Posts: 14,722
Feedback: 4 / 83%
                     
That probably means the doors are working. Could be bad expansion valve, or it's low in charge, but not low enough to keep the compressor clutch from being energized. Those are the things I can think of.

Radiator fans are working? It doesn't cool at hiway speed?

You might take it to a competent, honest a.c. shop and ask them to check the charge level. There may be a minimum service charge for doing that.
peva is offline  
post #5 of 29 (permalink) Old 06-03-2017, 11:43 PM
Woober Goobers!

 
Ronbo's Avatar
 
Join Date: Mar 2005
Location: Tiny Pebble, AR
Posts: 42,743
Feedback: 44 / 100%
                     
Radiator Fans aren't running when the compressor kicks in? Then you need to find out why. Fuse?
Ronbo is offline  
post #6 of 29 (permalink) Old 06-04-2017, 12:45 PM Thread Starter
Intrepid Newbie
 
Join Date: May 2009
Location: USA
Posts: 47
Feedback: 0 / 0%
 
30 and 40 amp fuses look good and test good with a multimeter.

Will continue to troubleshoot the radiator fans.
aerotive is offline  
post #7 of 29 (permalink) Old 06-05-2017, 05:17 PM Thread Starter
Intrepid Newbie
 
Join Date: May 2009
Location: USA
Posts: 47
Feedback: 0 / 0%
 
Had a mobile mechanic come today--only person available today, highly rated at least. He ran power from the battery terminal
to the radiator fans, they spun up. Also replaced the 30 amp radiator fuse. He switched the radiator relays around and said
one was bad, replacing it should fix it.

Got the relay from a parts store myself, but back to square one--radiator fans aren't turning even with the a/c on.

Will have the guy come back out tomorrow, in the meantime do y'all have any ideas?
aerotive is offline  
post #8 of 29 (permalink) Old 06-05-2017, 05:40 PM
Woober Goobers!

 
Ronbo's Avatar
 
Join Date: Mar 2005
Location: Tiny Pebble, AR
Posts: 42,743
Feedback: 44 / 100%
                     
Does the car overheat? Have you been running it normally?

If it runs normally without overheating especially at idle, stop and go traffic or standing still then the fans must be coming on at some point. Otherwise it would overheat.

Have you run the car up to normal operating temperature and checked the fans?
Ronbo is offline  
post #9 of 29 (permalink) Old 06-05-2017, 06:56 PM Thread Starter
Intrepid Newbie
 
Join Date: May 2009
Location: USA
Posts: 47
Feedback: 0 / 0%
 
Hasn't overheated so far, but I've been driving very little. Had it out yesterday 15 minutes each way, but at near highway speeds for most of that and it was cool out. Temp gauge was normal fans never kicked on. Much more that that and I think it would've overheated.

Mechanic did mention a bad sensor being a possibility will ask about that.
aerotive is offline  
post #10 of 29 (permalink) Old 06-05-2017, 07:16 PM
Woober Goobers!

 
Ronbo's Avatar
 
Join Date: Mar 2005
Location: Tiny Pebble, AR
Posts: 42,743
Feedback: 44 / 100%
                     
The same sensor that provides info to your temp gauge in the cluster is the same one that provides coolant temp info to the PCM for turning on the radiator fans among other things.

How about you let the car run at idle for 15 minutes or more while monitoring the temp gauge? If it starts to overheat and the fans never run then you have a fan control circuit issue. If it doesn't overheat then the fans should start at some point.
Ronbo is offline  
post #11 of 29 (permalink) Old 06-05-2017, 10:22 PM Thread Starter
Intrepid Newbie
 
Join Date: May 2009
Location: USA
Posts: 47
Feedback: 0 / 0%
 
Ran it while parked just now, fans came on at about 20 minutes. Fans stayed on for about about 5 minutes. Then shut off and the check engine light lit up.

Gauge never showed overheating.
aerotive is offline  
post #12 of 29 (permalink) Old 06-05-2017, 10:28 PM
Woober Goobers!

 
Ronbo's Avatar
 
Join Date: Mar 2005
Location: Tiny Pebble, AR
Posts: 42,743
Feedback: 44 / 100%
                     
What's the code for the CEL?

You know how to do the "Key Dance"? Ignition Key off-on-off-on-off-on three times quickly without starting the car. Codes show up in the odometer in the cluster.

Last edited by Ronbo; 06-05-2017 at 10:31 PM.
Ronbo is offline  
post #13 of 29 (permalink) Old 06-05-2017, 11:00 PM Thread Starter
Intrepid Newbie
 
Join Date: May 2009
Location: USA
Posts: 47
Feedback: 0 / 0%
 
Two codes...


P1684--battery disconnected

P1490--Low Speed Fan Control Relay Circuit
aerotive is offline  
post #14 of 29 (permalink) Old 06-05-2017, 11:10 PM
Woober Goobers!

 
Ronbo's Avatar
 
Join Date: Mar 2005
Location: Tiny Pebble, AR
Posts: 42,743
Feedback: 44 / 100%
                     
Symptom:
P1490-LOW SPEED FAN CONTROL RELAY CIRCUIT

When Monitored and Set Condition:
P1490-LOW SPEED FAN CONTROL RELAY CIRCUIT
When Monitored: With the ignition key on, battery voltage greater than 10.0 volts and
the PCM requests the radiator fan to be turned on.
Set Condition: An open or shorted circuit is detected in the radiator fan relay control
circuit.

POSSIBLE CAUSES
RADIATOR FAN CTRL RLY CIRCUIT WIRE HARN INTERMITTENT PROBLEM
RADIATOR FAN CTRL RLY CIRCUIT WIRE HARN OBSERVABLE PROBLEM
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
RADIATOR FAN RELAY CONTROL CIRCUIT OPEN
RADIATOR FAN RELAY CONTROL CIRCUIT SHORT TO GROUND
RADIATOR FAN CONTROL RELAY
PCM

"Just Junk It LLC."
"Just Charge It"...shit I fried my ECM!
Member of the Sold SRT-8 Magnums of DI.net Club!
Perky Jerky for Everyone!!
Crazy Rons House of Mega Deals
Ronbo is offline  
post #15 of 29 (permalink) Old 06-05-2017, 11:17 PM
Woober Goobers!

 
Ronbo's Avatar
 
Join Date: Mar 2005
Location: Tiny Pebble, AR
Posts: 42,743
Feedback: 44 / 100%
                     
Guess the next thing to ask is whether you're actually swapping the Low and High Speed Fan Relays and not others?

Ronbo is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Member names may only be composed of alpha-numeric characters. (A-Z and 0-9)

!!ATTENTION ADVERTISERS!! If you intend on advertising anything on this forum, whatsoever, you are required to first contact us here . Additionaly, we do NOT allow BUSINESS NAMES unless you are an Authorized Vendor. If you own a business, and want to do sales on this site via posting or private message, you will need to follow the rules. Shops, Stores, Distributors, Group Buys without being authorized will see your account terminated.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Random Question

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome