Varian GC EFC type 4 pressure problem

[abdidhere]

Please help Varian GC with EFC type 4,Helium with packed column,The column pressure set point is 21.7 psi and flow of 60 ml/min,please can some one help me troubleshooting this issue of GC showing not ready due to EFC pressure of 21.9 psi (Set point 21.7 psi) how can i over come this and is there a way to adjust.
For your information room tempearture increased slightly due to AC problem on this particular date.
Thanks.

[Gerhard Kratz]

Maybe the inlet of your packed column is blocked. Disconnect the column and check flow and pressure.