Q: Hot Water Tank

Hey,
I have a 40 Gallon John Woods (Pro Series/Energy Star) with the Blue Top Hot water tank (gas)
(it's about 7-8 y/o tank) 2nd tank of John woods in this house that i'm living.
Just had the thermocouple replaced a month ago.
All of the sudden today the pilot won't stay lids.
I try to re-light the pilot, it lid, and it stay on for couple of minutes or hours.
Q: Do you guys know what's wrong with it?
Better off buying a new tank right?
Q: Heard Energy Guide is better than Energy Star is that correct?
Q: Planning to go with AO Smith or Bradford White for Hot water what's your guys take?
Q: Has anyone experience of buying Hot water tank from Costco? (Brand: Rheem?)

Just showing this picture, just in case that something I can fix lol


Anything strange?


Thanks in advance!

At that age of a heater it makes more sense to replace it instead of putting more money in it in my opinion. I personally like Bradford and White the best. I would not buy a heater from Costco, Home Depot, Lowe’s, ect. as they have cheaper parts in them than at a supply house even though they have the same name. If you buy their 10-12 year warranty heater for more than twice as much you will get the quality of the 6 year from a supply house. Good luck!

Krisc


model number/ year on tank
with the info we can find the trouble shoot manual check that the damper [on top] is opening

is his a atmospheric vent with flue damper? most likely an air flow problem


https://www.johnwoodwaterheaters.com/en/literature-and-resources/spec-sheets-and-manuals

frodo said:

Krisc


model number/ year on tank
with the info we can find the trouble shoot manual check that the damper [on top] is opening

is his a atmospheric vent with flue damper? most likely an air flow problem


https://www.johnwoodwaterheaters.com/en/literature-and-resources/spec-sheets-and-manuals

Click to expand...

Hey frodo, not sure if you still gonna follow-up me or not
But the model is JW840S34ES-04 (if I'm reading it correctly)

do you have thermo coupling adjustment on that thing?

frodo said:

do you have thermo coupling adjustment on that thing?

Click to expand...

temperature setting? yeah it on default (on where it recommended)

Krisc said:

temperature setting? yeah it on default (on where it recommended)

Click to expand...

no man, the thermo coupling

look at it, see if it is in the flame or off a couple mm

you said a new thermo coupling was installed, then the heater started cutting out

check and adjust the position of the thermo coupling in the blue pilot light

frodo said:

no man, the thermo coupling

look at it, see if it is in the flame or off a couple mm

you said a new thermo coupling was installed, then the heater started cutting out

check and adjust the position of the thermo coupling in the blue pilot light

Click to expand...

yeah, it's in the flames

does the water heater work with the cover off of the burner assembly?
and not work when you put the cover back on?

thatt is the sheet metal cover

frodo said:

does the water heater work with the cover off of the burner assembly?
and not work when you put the cover back on?

thatt is the sheet metal cover

Click to expand...

*the technician recommended me to leave it off.
and yeah it works (but for a month)
haven't try putting it on

ok...it works with the cover off, but not on. then the problem is air
getting to the burner assembly/pilot light

. Make sure fresh air can get to the water heater. Get out the vacuum and cleanup all those cobwebs and flammable dust balls. The location of the water heater should have a fresh air supply, either with a louvered door or a vent line that goes outside. Make sure these are open.

frodo said:

. Make sure fresh air can get to the water heater. Get out the vacuum and cleanup all those cobwebs and flammable dust balls. The location of the water heater should have a fresh air supply, either with a louvered door or a vent line that goes outside. Make sure these are open.

Click to expand...

anymore tips
if those things doesn't work?

nope, if you have vacuumed the burner chamber, and still not getting air
i do have a solution, but it is not conventional

Did you “bypass” the overheat sensor?

DON'T bypass safety features on a water heater, particularly not a gas water heater. The guy in that video, and everyone who follows his advice, is leaving himself open to a big kaboom.

I was saying to by pass it to see if it is defective. With the assumption that if it were, it would be replaced and problem solved.