Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: What does LL.L reading mean?
Document: This is a terrible product. I will be looking forThe first one I had for a few months and suddenly the screen read LL.L instead of reading the temperature.
The first one I received didnt work. It kept reading LL.L on the screen. I changed the battery and even try to do a web search on the manufacturers website. I emailed the manufacturer to ask if I was missing something as to why it wasn't working and within a day I received a reply stating it was defective and to return the item for exchange. Yes it was a little bit of a hassle, but it wasn't to bad.
I tried to get this to work. Most often it gave negative readings. Occasionally it gave readings that were more reasonable. I tried the reset with ice water twice. I tried taking out the battery several times. It sometimes seemed to work but the next time I used it it would give false readings or LL.L reading which I don't understand.I finally give up on this.
Worked fine for a few uses then no matter what the only thing that would display is LL.L. I tried new batteries and re-calibrating it. In my opinion it's a piece of junk.
This worked for about a week. Now whenever I try to use it instead of a temperature it says LL.L. Tried resetting it and replacing battery, but it still does not work.
I bought this thermometer for the Thanksgiving day turkey and to measure the heat of water I use to make coffee. On first use it displayed an inaccurate temperature for a few seconds and now permanently displays LL.L.
First thing out of the package the display read "HH.H" which I took to mean the temperature was reading too high. Seemed strange, but then I noticed the calibration routine outlined on the package so I "No problem, it just needs calibration!" But, disappointingly, the thermometer continued to read HH.H even when submerged in the ice-water mixture, and pressing the calibration button only resulted in the display reading "Err".
What I mean is if you are cooking a pork chop or steak then you should put it in the middle on the side of the meat. This way you will not be worried that you are poking too far into the steak and not measuring the middle of the meat. Grab the meat with thongs, tilt it off the cooking surface, then stick the thermometer into the side of the meat until it reaches the middle.
This is a great product and I am Greatly satisfied with my purchase.Thank You for reading.
It gives a quick, clear reading without fuss and cleans easily. I'm very happy with it.
Answer: Per the internet and some experience with thermocouples, it may mean bad thermocouple. If this is the case it is broken.