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Old 05-24-2012, 03:11 PM   #31
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Join Date: May 2012
Posts: 14
Originally Posted by KyDan View Post
As I've said before-- and LOTs of folks have trouble with this...

The 120v AC heater is TOTALLY INDEPENDENT of the LP gas burner and
control board.

They are not connected anywhere at all period.
The ONLY thing the electric and gas heat have in common is the tank
of water they are trying to heat.

They have separate power sources and separate off/on switches and
separate T-stat/hi limit switches.
There is NO control board for the AC electric heater.
It's simply a heater- inside the tank, a thermostat/hi limit switch- outside
the tank and a black off/on rocker switch which is usually found in the
outside hatch near or even behind the gas burner tube.

OK so you now have electric hot water working OK yes???
You have it shut off so the tank is cold-- good.

You say the gas t-stat was burned out???
Have you replaced it??
Have you tested for 12v at one end of the t-stat???
I guess you do have that because you said earlier that you jumped
across the gas T-stat and the burner tried to light-- you heard and
or saw the spark jumping???

IF you had spark all you need is for the gas valve to open.
You need to put a meter across the wires for the gas burner valve and
see if you have voltage AT the burner valve while it is sparking.
Set your meter on DC scale and you should find 12v across the gas
valve while it's sparking.

1-- If you do have voltage but don't smell gas the valve is stuck or burned out.
2-- If you don't have voltage at the gas valve this would indicate a probable
bad control board.

I think you have narrowed it down to 1 or 2.

It's awfully hard to trouble shoot your water heater from my basement but
that's my opinion.
I'm not gonna tell you to go messing with the LP gas part of the system.
If you mess up and have a leak or other problem that causes you a fire
or other grief I don't want the blame!

I'll tell you that I'd not be afraid to continue but I've got 37 years of
industrial maintenance under my belt and feel confident doing that kind
of stuff.
If you don't feel confident, it's getting closer and closer to time to go
to a repair shop.

First of all i would like to Thank you for your help it was really apreciated and helpful.I could not get this off my mind and had to figure it out so i went out and checked each wire and found one of the brown wires going to the solenoid to open the gas valve im assuming was broken,i prob done it while i was taking the cover for the t-stats off.I repaired that wire,hooked it back up,jumped the 12v t-stat and she fired up with no problem at all which made me a very happy camper(no pun intended lol)So all and all im out a 12v t-stat which cost $20 im guessin.I live in a small town in Northern Newfoundland,Canada so i dont have access to much when it comes to tech. help /rv parts etc.But with your guys help i now know basically everything to check/troubleshoot with HW heater.It will come in handy im sure one of these days.So once again Thanks alot and happy camping!! p.s. if your ever in St.Anthony,Newfoundland ,Canada look me up,fresh seafood dinner on me !!! Google us ,we have lots of visitors from the U.S !

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Old 05-24-2012, 04:14 PM   #32
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KyDan's Avatar
Join Date: Mar 2008
Location: Louisville, KY
Posts: 5,648
Google search for Suburban 232319
This is the 140 deg F 12v Suburban thermostat/hi limit.

I found several places selling it. I'm sure you'll find one that ships to
Canada and your good to go.
Any RV seller with a decent parts dept should have it.
Online cost anywhere from $18 to $26 US.

I'm going to mark this thread Solved!!

We are very glad to have been of assistance.

I can't rule out a Canada trip some day.
Wife is maybe going to retire in a year or 2.
When that happens I want to do some serious traveling.
Touring Canada is in my "bucket list"!

PS. Be SURE you replace the thermostat cover carefully.
I believe it has a gasket and 3 screws. Replace all 3 screws carefully and
fully. That cover is there to air seal the outside burner/exhaust area
from the inside water tank living space.
It could be possible for exhaust carbon monoxide gas to get inside your
RV with the T-stat cover loose or missing.
It's IMPORTANT to be sure it's back in place before you use the
gas heat!!

Happy Camping!

Dan & Rita D
2004 5.3L Silverado 1500 ext. cab 2WD
1999 Suzuki Intruder Motorcycle
Blue Ox WD hitch, AirLift load levelers

Camping days 2010-53, 2011-47, 2012-41,
2013-41, 2014-31, 2015-40, 2016-38
KyDan is online now   Reply With Quote

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