1994 390CPMY 11 gallon water heater

[km1125]

On mine there wasn't a visible thermostat, but if you removed the cover the temperature control device was adjustable.

[tonyiiiafl]

I did remove my cover where the wires go in. No stat here.

[Viper]

The thermostat is a set thermal type round switch. Their high limit switches were round and usually had a little red reset button on them. There must be a stat and limit switch.

[tomschauer]

Thermostat and high limit cut out are on the front of the unit where your 120v wiring enters. The stock units are not adjustable.

[Viper]

Tom is correct. Your hot AC wire will be going through the stat and limit switch before heading on to the heating element.

[tomschauer]

You have a klixon thermostat and and a klixon resettable high limit switch. At least you should.
These are round, about the diameter of a quarter. The high limit should have a very small red stem for resetting.

[bud37]

All water heaters should have a safety circuit of some sort with a high limit and temp control or there can be catastrophic results ( can explode) if the heat stays on and the relief valve fails.Try to find yours and determine if it works correctly.

[tonyiiiafl]

[quote][/quote]

Mine DOES turn on and turn off, just nothing I saw under that cover. Going to dig in again.