Compression Ignition Addict
Join Date: Sep 2008
Location: Burlington, NC
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
A/C blows HOT heated air except when on Max A/C
Drove about 30 minutes to a wedding yesterday. Truck sat for about 4 hours then when I started it to drive home it was chilly out so I turned to temp control knob the hot until the truck warmed up a bit. After that when I turned the temp knob back to a cooler setting it just kept getting hotter and hotter. When I switched to max a/c it started cooling off but as soon as I switched to anything other than Max a/c it started pumping out really really hot air as if the heat was on max. Now all I get when I turn the fan on any setting other than Max a/c I get max heat coming out, no matter what register it comes out off. All wires appear to be connected to the heat and a/c controls. Can anybody help me, tell me how to diagnose the problem?
06 F-350 psd cc lb FX4
ARP Head Studs
Gearhead CUSTOM 50hp Tow tune w/ trans tune & EGR off
Circuit Board Medics FICM
"STOCK" Binford 6100 Diesel w/ MORE POWER!
"I just wanted to see.............if ya'll wanted to buy a possum"
Last edited by Fandini; 05-03-2011 at 07:40 PM.