Printers refuse to send low toner cartridge email alerts

[keredd1010]

For some reason these printers (we have 4 of them) never sends me an alert when it is on low cartridge. The test alert goes through and I even added every single alert it has and they all come through like clock work but for some reason the low cartridge alert rarely goes through. Could it be because I have the low toner threshold set too low (5%) ? I am not going to say they never come through but I would say probably 80% of the time they do not.  All help is greatly appreciated. 

[Repairatrooper]

Really, if you are looking for alerts, 5% is probably too low. Most cartridges stop delivering quality pages around this threshold and are empty for the most part. 10% might be a better mark for getting a notice before it becomes a big problem.

[keredd1010]

At 5% I honestly have not seen any suffering in the print quality and I also have the printer configured to stop altogether when it reaches very low to prevent anything coming out with no print on it.  The reason i have made it 5% is because when I had it at 10% and the alert came through it said it still had approx 1000 pages left before it would run out. That seemed like a lot so I thought 5% would be appropriate. We also do A LOT of printing here and I the company we have hired to provide us toner has set their software to alert them at 30% before they mail us a replacement. I am not exaggerating in saying we do 30% in 2 days easily. Keeping the cartridge running until 5% gives them more time to send it. I will raise it to 10% if it fixes the issue. I had it at 10% and it was still a bit spotty, albeit worked at a higher rate than it does now. 

Thanks!

p.s. I forgot to mention that these cartridges are the high yield ones so each cart we get approximately 25k prints. So 5% is not really low enough to risk getting bad prints.