Customer said it does the following, but I have not seen it do any of this;
1) main burner will come on and go off up to 3 times rapidly, but pilot never goes out
2) booms on start up, shaking the entire unit
3) flames will be all blue for up to 5 minutes, then turn to yellow from middle up
I have checked all the install parameters and they seem correct- gas pressure, alignment, glass "ember" placement, orifices and shutter. Unit is in the basement of a 2 story house vented with flex liner up the existing chimney(first 6 feet of chimney below grade and remainder is exterior of house).
I cannot get it to do any of these while I am there. This unit has been nothing but a PITA since installed.