RE: 597X Diff pump error message of "too hot."

[romanlgn]

If you changed your diff pump oil and are now seeing this error you must consider that you may had damaged the leads to the "too hot sensor." Look at the diff pump, find the two discs on the side, each having two wires. The one with the red wires is the two hot switch or sensor. Remove the pump, pull a little on the wires, I would suspect that the weld/solder of one of the wires was broken while working on this. Simply remove the plastic covering on the connection, reattach, and re-insulate. once you put it back together, you will find out rather quickly if it works.


Posted: Thu Sep 07, 2006 7:04 am Post subject: 5971 diffusion pump

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I changed the diffusion pump fluid in my 5971 MS and am now getting a "diffusion pump too hot message". The fluid is pre-measured so the fluid level should be OK. Has anyone experienced this problem?

[MEH]

It turns out the diffusion pump cooling fan failed. Apparently this is a fairly common problem.

[Consumer Products Guy]

I've riveted a new cooling fan to the aluminum housing (5972A), was faster and cheaper than buying the replacement one from Agilent. Yes, one can feel behind the MSD to feel if the fan is operating.