Ain't no manual. It's a company truck. Right now it's working fine. But the other day it was showing signs that it might actually live up to the name I gave them years ago, .. "WEBASTARD"
If they can't design a heater that will last more than a few months without some kind of maintenance that requires taking the damn thing apart, they shouldn't even bother.
Doesn't need maintenance every few months. I had mine serviced after 5 years. You should probably take it out and idle.
