Class A DP Fumes in Coach While Driving
All, In 5K miles of operation this year, our DP has a strange issue that has only occurred three times in 10 months. We will get a strong diesel exhaust smell in our 2015 Fleetwood Discovery 40E. It...
Forum Discussion
doxiemom11 wrote:
Don't know about the fumes, but with your setting on "fresh" - you are pulling outside air into your rig. If you set it on recirculate, it will use inside air only. Try not using the "fresh" setting and see if it still happens.
And to elaborate on that just a bit:
Under just the right conditions, the air currents around the body may "pull" the exhaust TO the point where the fresh air intake for the HVAC is located. I know it is hard to imagine this happening when you are cruising down the highway but it CAN and DOES happen sometimes.
In some cases, a slight modification to the exhaust exit will cure the problem......like an exhaust tip extension that directs the exhaust flow more toward the rear....and/or farther away from the body and under-carriage.
