Hello All,
I am new to the forum although I have been browsing this site for 6 years. I seem to be having a heat build-up problem in my engine run box. I have a 2009 Marquis, Lapis IV with a Cat C-15 purchased 2 years ago from Beaver Coach Sales. I have had to replace the Big Boy and the smaller solenoid twice each along with the run circuit board (EXPENSIVE). I have to keep the cover off the runbox or the heat builds and I go into downrate. Gerald mentioned on another post that the voltage going through the Big Boy drops after it pulls in to reduce heat. How do you check that it is really dropping? I am considering punching a couple of holes in the runbox and installing a small 12 volt fan and a screened vent. Any and all help, thoughts and consideration would be greatly appreciated.