[Joker29]

On my 06 Megacab, I turned the air on and no cold air comes out and the pressure seems a little low. When I rotate the knob to select different areas, the air redirects just fine, not cold though.

 

[clintlohmeyer]

joker try this thread. This may not be the problem but It was on mine. Same problems you were having. A broken air door hindge. I rigged it up with some golf shaft epoxy and melting it back together with a torch and it worked perfectly. Took about 45 minutes but cost me nothing.

http://www.cumminsforum.com/forum/3...blowing-air-easy-recirc-door-replacement.html

 

[BWdiver]

But would that stop it from blowing cold?

Mine quit a few months back, got under truck and spottedthe AC compressor and notice the clutch wasn't moving or spinning.... cure, new ac compressor from Dodge fixed under warrenty.

 

[ynots57]

my a/c lost its charge, blew plenty of warm air but no cold. tech told me alot of the trucks come from factory undercharged. they put dye in the system and later replaced the compressor & evaporator due to leaks

 

[Joker29]

Where can I find the compressor?

 

[smokin2500]

i would just try charging the system, my brother in laws did the same thing, recharged the freon and it has worked perfect since.

 

[Joker29]

I'll take it to get charged today.
Dont know if the flapper door would be the issue as it blows alot of hot air with the heat on.
Secondly, I cant hear the compressor clicking off and on

 

[surfram]

i would just try charging the system, my brother in laws did the same thing, recharged the freon and it has worked perfect since.

Do those DIY A/C recharge kits kits work?

AutoZone.com | Freon 134a | 17 oz. of R134a and 2 oz. of Sub Zero A/C Booster with Shelf Saving Dispenser

 

[smokin2500]

just go to the parts store and get the adapter hose and a can or 2 of the freon.

 

[Joker29]

Had it looked at this morning. It was empty so we filled it and it worked great.
It's already getting warm again though.

 

[Hayseed]

Sounds like you have a leak, huh. If it is leaking that bad you should be able to find it easily. If the inside of your truck smels like a gym bag when it is on then bad news, ya gotta pull the dash (evaporator). If not trace all the lines and condenser radiator to feel adnd look for oil or hear the leak. If you can't find it load it up with a can of UV dye and enough freon to keep the compressor running at least until you get the dye circulated. Then use a black light in the dark to spot the bright yellow dye and the leak. Then all you have to do is fix it.

 

[Joker29]

May its me, maybe not, but tonite, it was cold. Are the units that bad in the heat?

 

[Joker29]

We did put dye in today, so I will look tommorrow. No it doesnt smell like dirty feet, I mean gym bag.

 

[Joker29]

it's definitely empty this morning. We also put a vacum on it and it held

 

[Hayseed]

Sorry but on a mega they aren't that great. Same system as the others but way more area to cool.