AC problem wont come on at first start---comes on after about a mile or two
Asked by gjdodge Aug 25, 2013 at 10:58 AM about the 2006 Dodge RAM 3500 SLT Mega Cab RWD
Question type: Maintenance & Repair
2006 dodge ram 3500 mega cab diesel 5.7 turbo up until about a month ago no
problems--now ac doesn't go cold until it runs awhile---but then start or stop it works fine
until you let it sit overnight---then same problem. Thanks
7 Answers
Ac won't blow at all or just not blowing cold?
If not blowing at all look under passenger side dash. You will see the box where the blower motor is located. Tap on this box. If blower then starts its a blower motor issue. Inspect or replace blower motor. If blowing but just not cold check to see that electric radiator fan is coming on. If not it probably needs to be replaced. Check for voltage at fan motor. When mine went bad I could give it a tap on back of fan motor then it would start. Hope this helps. Oh and also on these models some owners have an issue with the damper door mech breaking in the air duct work.
not the blower its working fine---just not blowing cold.
I turn the ac on and off and eventually it will just start blowing cold. Then it works great.
Ok check the electric radiator fan. It's probably not coming right on as it should.
thejeepdoctor answered 10 years ago
also ck to see it the compressor clutch is engaging. could be weak coil.
I found out, that the computer finds low voltage and shuts off AC. Several miles later, it will turn back on. Why. Because when first starting your truck, the Voltage Regulator cycles itself and the crappy thin wires and connections with change in voltage causes computer to shut off AC. Drive the truck about a block and a half, and then turn on AC. Works every time. That is assuming everything else is OK.
