GDI30 issues

[pacnw]

Propane conversion

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.

[hearthman]

Sounds like a venting issue to me. Verify the intake and exhaust are on the correct liners and the appliance collars are not packed with insulation.

[pacnw]

Thanks!!

[fire-parts]

Sounds like the unit might be turning on and off quickly causing gas to build up and boom. Check loose wiring or bad switch