The heater does not shut off until I flip the breaker.I have replaced the thermostat.It did not fix the problem.I was told it was because I used a cheap thermostat.Then I was told the thermostat had nothing to do with it that the problem was with the heater unit.Money is very tight so I'm trying to not have to call a service tech. Have any suggestions?

http://waterheatertimer.org/Water-heater-is-tripping-breaker.html

Gene
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If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

There is a suprising lack of information on those water heaters. Do you have any idea how old it is? Is it in a mobile home?

You might have electric water heater.
Symptoms are not known
Reset button should be pushed firmly and then it catches. If it does not reset, then replace thermostat. If it is not tripped out, then check circuit breaker.
Copy following links for electric water heater troubleshoot.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Hi, i've found out that the flame sensor (rod that sits within the flame) is fouled with carbon on the surface. I believe this shields the rod from proper heat detection and the sensor reports that there is no flame and to shut off the gas valve to avoid explosion. Once you pull out the rod and cleaned it with a wire brush, it should fix the problem whatsoever.

Hello,If just installed the thermostat check that the wires are not touching anywhere.If not the case you have a open(tripped) HIGH LIMIT at the furnace and the blower will continue to run untill it is reset.

hi there,
ac not cycling off,the thermostat is not working
have to replace a new one.havve anice day fix my rate thanks

It could be, or it could be a wiring issue. Make sure that your wires are in the correct place (R or Rh and W), and that they are not touching each other. If you have the unit running, and you disconnect either of the wires, it should shut off. If it does not, then the problem is in the wiring. Hope this helps

I had this problem once in an apartment I own. it was an EXTREMELY ease fix. my problem as that the set screws in the breakers were not tightened enough, and would cause heat to build up, and trip the breakers. so..... first try to tighten the set screws on your breakers.

Check the relays!