TURTLE wrote:

"JT" wrote in message
...

I've got a 30 year old gas water heater. In the past 5 years I've
replaces the "thermocoupler" twice because the pilot light would go out.

It's out again and this time the new thermocoupler didn't work. The
pilot will not stay on. Is there something else that I should check ....
or did I just get a bad thermocoupler?

Thanks,
JT



This is Turtle.

What you say here can have two causes to not work.

Bad Thermocouple.

Flame of pilot to low or short, stopped up, hitting the middle of thermocouple
head, or flame of pilot lite not hitting the top 1/3 of the thermocouple like it
is suppose to.

You forgot the other five possibilities: The thermocouple seat could
have trash in it preventing electrical contact or even causing a short.
It may have been cross threaded. The gas valve may be weak or out. They
may not be depressing the knob fully. The thermocouple may be faulty.

hvacrmedic