Left a 400 W dehumidifier running off a wattmeter. After a week or two, the dehumidifier didn't work any more. The fan is on but when the compressor tries to start, the display jumps to about
1200 W for a couple seconds, a click is heard (maybe a klixon) and that's it.The dehumidifier works fine without the wattmeter.
The wattmeter now reads 300+ W for three 36 W FT when it used the read about 140 W.
Is this a well-known failure mode ? Bad shunt ?
Thanks in advance.