I have a very old International furnace, we recently just moved in and are trying to save on cost. We have comepletely cleaned the furnace and it is obvious that it hasn't been maintained in years. The flames are very high and orange, and when we adjusted the regulator to where the flames are blue and 1'' high the last burner goes out. Do we need to replace the gas regulator valve, or is there anything else you could suggest before we call a proffesional?
You need to adjust the regulator using a manometer to make sure the pressure is set to mfg specs. May be something as a burner air adjustment to cure the flame problem. I would suggest you call a tech before you cause damage to your property or yourself.
I actually got the answer to my question last night, we had someone come take a look at the furnace. Oddly, and I didn't no this the flames on my furnace were normal, becasue I have a pretty ancient unit. The last burner that had the 'normal' looking flames was the problem. THERE WAS A SPIDER WEB in the orificer. That was the only problem.