Why does my water heat keeps going out if a put a new thermo coupler

Sounds like you need a new Thermo coupler.
Could be as simple as a dirty pilot and needs cleaning but I suspect a thermo coupler.

it might be the thermal coupler....it is a piece of wire that goes from the pilot to the thermostat. very inexpensive. .I am a 50 yr old woman, and I changed mine on my furnace twice..Home Depot or equivalent should be able to help. Google "thermal coupler"

if you have a pilot light but no flame you need a thermo coupler very easy to change but you need
to turn the gas off and pull the gun out at the end of the gun the pilot light heats the thermo coupler
that tells the gun it has a flame at the end and its ok to turn on the gas for a flame home depot will
carry a new one for you

hope this helps you
good luck
bob

I take it is on an RV?

The placement of the thermo coupler would be important - but no bigger hammer required... lol

be sure your connections are good and nothing got pinched off...

Alternatively there are some systems which have a lock out which may have happened and you might need a reset or otherwise let it cool down completely

or it might not have been the thermo coupler to begin with...


Best regards
ck

the gas regulator is your problem is the thermo coupler was changed so many times

Does the gas flame fully heat up the coupler
if not then clean out the gas jet nozzle
if yes then replace the thermo couple

you need to replace the thermocouple its an electronic device that keep the gas flowing . the pilot light is always on and the thermo couple controls the flame. if it goes bad the flame goes out and the burner wont come on to heat the water, they are easy to replace and available at all home depot or a lowes kind of store.

try using a jumper wire across the poles of the thermostat, if this works the thermostat is bad. if this does not work you may have a defective main gas valve

Thermo coupler may be defective. it controls the main gas valve by closing main if pilot is out. make sure thermo coupler bulb is positioned over and near tip of pilot flame, but not in the flame. Thermo couplers are inexpensive and easy to change out.

It sounds as tho the thermo coupler has gon bad. They are not to hard to replace if you are handy. You can pick them up at Home Depot or a hardware store. Good Luck
Kurt