I have a recommendation for a possible “Lab.”
A few days ago I noticed my gas water heater had some indicator lights on. It was an error code for “System in lockout.” I did not know the water heater was not functioning until I saw the LEDs. Before researching the code I increased the temperature to make the WH turn on. It would start up and turn off in less than one minute. After it shut off, it would try again after about another minute and turn off again.
From the WH manual, “System in lockout” could be one of these problems:
Gas supply is off or too low to operate
Hot Surface ignitor not positioned correctly
Low Voltage to the water heater
Electric Polarity to unit is incorrect
Today I had to take a cold shower and that got me in gear! A little Googling and Youtubing at 4 am before work led me to the culprit, a dirty flame sensor.
My WH normally has 10 minute ON cycles. I think Sense could EASILY pick up a series of irregular (short) 1 minute cycles and highlight a possible problem with the WH. From the web app I did go back and found the 1 minute cycles, when the WH was trying to start up. I don’t know what the ratio of electric to gas WHs is, but a lab could help up to 50% of people see a problem when it happens. At the very least Sense did help me troubleshoot the problem.
I just cleaned the flame sensor, the burner, and enclosure, and now the water heater is heating! Only problem now is Sense is picking up the WH in OTHER!!!
Short Cycles due to dirty flame sensor