I purchased this printer new a couple of years ago, and was generally very satisfied with it. UNTIL, it started developing printhead problems. Despite all the troubleshooting information that HP provides with its Toolbox, and after many hours of work, I was unable to restore the printer to normal operating function unless I purchased a very expensive printhead. So I did it, ONCE. And it worked fine for a few weeks but then failed again. So I called HP and after a long time on the phone with them, and weeks of waiting I received a new printhead under warranty. Replaced it again, and again after a few weeks, it started with the same problems. (Black ink wasn't printing at all).
I was sick of it, and was about to throw it away, when diagnosing another inkjet printer, I came upon a suggestion to clean the printhead with HOT water. I had tried all kinds of chemicals (pen cleaner, alcohol, and cold water) but had never tried HOT water. It worked like a charm, and restored the functioning of the printer to like new.
So, fix yours if you're having a problem! I don't know why HP wouldn't recommend this, as it is so effective, and I think would improve their customer perception immensely. I've always been a fan of HP, but with a few of their recent products, I have been less than impressed with reliability and support.
So here it is. From the underground. Run the printhead under hot water at the sink for a couple of minutes, or for really stubborn clogs, put it in a pan and simmer for a couple of hours. I hope it works for you like it did for me!Get more detail about HP OfficeJet Pro K550 Color Printer.
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