HP 6890 inlet heater failing

Hi Anatoly,

Logically, this is a service call to check onsite and to get support from local agilent.

But if you want to do by yourself then check heater of inlet block.

May be it's malfunctioning or going to damage.

If you have two same inlet in GC then by swapping, you can confirm it...

Even sensor also may corrupt..

Share type of inlet like split/splitless or coc or methanizer or ptv?

It's a split/splitless

The 6890 is obsolete from a sell as new perspective, and it has passed its guaranteed support stage, however it is still on "best effort" support which means Agilent can repair it while we still have the parts.  Agilent still has 6890 parts.

A service call could be placed with Agilent.

If you have part # then you can order from agilent.

Still 6890 parts showing in agilent parts order category..

The original part seems to have been obsoleted twice.  The new part number is here: https://www.agilent.com/store/en_US/Prod-G1530-67950/G1530-67950  Now I have a dilemma, to buy a new part or refurbished from Full Spectrum...

I am particularly concerned with the part number having changed twice.  Is there a guarantee that this new part number is fully backwards compatible?

I am particularly concerned with the part number having changed twice.  Is there a guarantee that this new part number is fully backwards compatible?

When a product is supported for a quarter of a century like the 6890 has been, over that time some part suppliers change or slight modifications are made.  Either reason can be cause for a part number to change, even though the part serves the same functionality.  If an old part number has been obsoleted but a new number is stated as the replacement, then yes it is backwards compatible.

Just a FYI, if you decide to replace the thermal cable and heater yourself, the thermal block and inlet weldment may need to be ordered as well.  Sometimes the inlet weldment will stick inside the thermal block, and my personal experience is the heater itself sticks in the thermal block from years of high temperatures.

Thank you so very much!  We will try it one step at a time - always trying to save money here :)