[IslandGreco]

Thermador Model PGR366zs

PROBLEM-
Oven (convection and bake) will not stay lit.
&
Broiler will not stay lit.

OBSERVATIONS-
Start-to-Fail Sequence:
Set dials to start a bake or broil; igniters fire; Gas solenoid valve(s) open(s); burner ignites; burners burn for a few seconds; gas flow is stopped by the valves; unit reports an error code of 3 flashes of "heating" (middle, blue) light.

When the above sequence is repeated, the duration of the burning time will gradually increase as the oven temp increases. After 10-15 repetitions of the above sequence, the oven will heat to above 200f. Once the oven is above approximately 200f, the unit will ignite and function properly.

The main control unit on the back of the unit was replaced under warranty in about 2006 with a factory repair bulletin. All other functions of this unit operate properly.

I'm familiar with the service and assembly of the range, XLO modules, fans, etc in the top of the unit. However, I will need help with the assembly and access to the area beneath the oven compartment.

Thanks in advance for parts and service advise!

[IslandGreco]

ADDITIONAL DETAIL:
When the set-point of the oven is low (250f), the oven will fail to maintain the temperature after the initial warm-up and will go cold.