rogedie Report post Posted June 2, 2020 My friend's heater ignition won't light when he camps in high altitude, but works fine at home near sea level. Share this post Link to post Share on other sites
jleamont Report post Posted June 2, 2020 rogedie, please post the year, make, and model of the RV and the heater make and model in question. Share this post Link to post Share on other sites
rayin Report post Posted June 3, 2020 My EWAG is the burner is already adjusted too rich at low altitude, at high altitude the air to fuel mixture is above ignition point. With answers to those questions I might be able to stop guessing. BTW, thanks for taking care of a friend. Share this post Link to post Share on other sites
