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How to Test Internet Connection Speed


You want to know your Internet connection speed.


You can use SpeedTest.netor similar website to test your connection speed. Your result will look similar to the graph below:

Speed Test Result

You can see your public IP address on the lower left hand corner ( for my server). My download […]

How to Escort Elder or Foreign Visitor to Airline Gate with an Escort Ticket


If a passenger needs help to get to an airline gate, such as an elder person or a foreign visitor who does not speak English, it is better for a family member or a friend escorts her to the gate. But without a valid flight ticket, TSA does not allow any person pass the […]

Trane Furnace Open High Limit Device


Trane XR80 furnace did not produce heat. LED indicator inside its access panel blinked 4 times. Trane’s manual indicated “Open High Limit Device”.


The high limit device is the furnace temperature limit. It shuts down the furnace when its burner reaches high limit. Under normal temperature, it should be close to allow power […]