toolz Posted January 31, 2019 Report Share Posted January 31, 2019 I have a 2006 M2 with 82,000 miles. The knob that directs the air flow through the dash for foot, dash, and defrost has no effect. Air always comes out of the dash vents. Makes it tough to drive through freezing rain or snow with no defrost. I also have a 2005 M2 box truck with the same problem. What is the common cause for this? Thanks Link to comment Share on other sites More sharing options...
hemsteadc Posted February 1, 2019 Report Share Posted February 1, 2019 Mine's the same way. Interesting. Link to comment Share on other sites More sharing options...
Darryl&Rita Posted February 1, 2019 Report Share Posted February 1, 2019 Most common failure points for this type of system are; Control knob, actuator, and wiring. In that order. I have been wrong before, I'll probably be wrong again. 2000 Kenworth T 2000 w/N-14 and 10 speed Gen1 Autoshift, deck built by Star Fabrication 2006 smart fourtwo cdi cabriolet 2007 32.5' Fleetwood QuantumPlease e-mail us here. Link to comment Share on other sites More sharing options...
Grassy Posted February 17, 2019 Report Share Posted February 17, 2019 After working on mine, it is better.. but not great. I do believe I read somewhere that this was an issue with these rigs.. . Arctic Fox 29-5T . Beagle co-pilots - Faffy and Lulu Link to comment Share on other sites More sharing options...
Fhkw9DPJ8V1g Posted February 25, 2019 Report Share Posted February 25, 2019 On 2/17/2019 at 5:40 PM, Grassy said: After working on mine, it is better.. but not great. I do believe I read somewhere that this was an issue with these rigs.. What did you do to improve it? Was there anything in particular? Link to comment Share on other sites More sharing options...
Grassy Posted March 1, 2019 Report Share Posted March 1, 2019 On 2/24/2019 at 8:25 PM, DonCoyote said: What did you do to improve it? Was there anything in particular? Yes.. i found the flaps not fully closing. Improved considerably. I also put a shut off valves on the hot water tubes going through the dash. When it becomes warm, I shut them off and the a/.c improved. I also installed an old style metal fan on my dash, on a board.. plug it into a 12v plug. I like air blowing on me so everyone in the cab is now happy. It also looks OEM. . Arctic Fox 29-5T . Beagle co-pilots - Faffy and Lulu Link to comment Share on other sites More sharing options...
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