Having a similar issue with Laars LT 250 (natural gas). It has worked fine for 13 years. This year it started igniting intermittently. Now it will not stay lit at all. The surface ignitor glows, the gas valve clicks open, the gas whistles through the orifices, the burners light, but the valve clicks off within 3-5 seconds and the blower increases to vent the gas. After three cycles the AGS (auto gas shutdown) error illuminates. So far I have:
Replaced the flame sensor
removed burner assembly, vacuumed and blown out the burners
removed, verified gas orifices are not blocked
tried to light in both pool and spa mode (better water flow in pool mode)
There have been no changes to natural gas supply line etc.
I have the manual and will work through the check lists but I thought there maybe someone on this awesome forum who has some ideas of what to try next.
Replaced the flame sensor
removed burner assembly, vacuumed and blown out the burners
removed, verified gas orifices are not blocked
tried to light in both pool and spa mode (better water flow in pool mode)
There have been no changes to natural gas supply line etc.
I have the manual and will work through the check lists but I thought there maybe someone on this awesome forum who has some ideas of what to try next.