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Old 05-17-2013, 12:50 PM   #15
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As another mentioned, check the thermocouple. Sometimes just lightly cleaning the anode with a light emery cloth is all it takes. If it's dirty or covered with rust, the water heater is going to think it failed to light and shut off the gas valve.

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Old 05-17-2013, 01:06 PM   #16
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Dunno about the OP's RV, but our '88 Winnie's fresh water drains are opened/closed by valves INSIDE the rig, not from outside below - so there might NOT have been an issue with external valves "cut off", which would certainly be an extreme and foolish action...

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Old 05-17-2013, 01:11 PM   #17
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Originally Posted by jnp_macklin View Post
Properly bled..... verified by water coming out of vented pressure fitting at top of HWH.

You need an air cushion at the top of the water heater tank to accommodate the expansion of the water as it heats up. You accomplish this by merely filling the water heater tank by opening one or more hot water faucets in the RV with the tank empty. By design, as the water heater tank fills, it will leave an air cushion at the top of the tank.

If you truly have water all the way to the top of the tank, you'll have water spitting out of the pressure relief valve as the water heats up, expands and has nowhere to go.

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Old 05-17-2013, 05:24 PM   #18
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Smile ON our last time out the Water Heater did not fire, but

it eventually did after running the heater for awhile. Apparently although I got the stove, oven and fridge to run your problem sounds like what we experiencd. The MH sat over the winter and I checked everything everyone else has mentioned. The Wife turned on the furnace and low and behold the water heater finnally took hold and stayed on for the rest of the week. I guess there was some trapped air in the lines that still needed to get out.

Hope this helps, still get out...take an electric heater in case you do have a cold spell.

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Old 05-18-2013, 11:54 AM   #19
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Give us a follow up when you can to let us know how your trip turned out and what was the result of the water heater situation.

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Old 05-19-2013, 07:37 PM   #20
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The drains were exactly like you said.... the valves were inside the basement doors.

Water pump was bad.... Small leaks, damp carpet, replaced...

Bottom of entry door repaired...

I didnt get a chance to check on the HWH yet, as I didnt get a chance to refill the onboard LP tank. We'll save that for next time.
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Old 05-19-2013, 10:28 PM   #21
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I would check for three things: 1. Is your water heater full? If you open the pressure relief valve at the top, does water come out?
2. Is anything blocking the air intake tube? Look for bugs, mud daubers, wasps, etc. with a flashlight.
3. Replace the thermocoupler.
One other item...I had the exact same thing happen on my water heater once when I was de-winterizing. It turned out that I had opened the pressure relief valve while filling the water heater and it had gotten the wiring / control board wet. I let it sit overnight and everything fired the next morning. Hope yours is that simple.
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Old 05-20-2013, 07:33 AM   #22
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Thanks everyone for the suggestions.

I had a whole description of the events of the weekend written out but when I went to preview it, my browser locked up and I lost it all.

The weekend was fun, but busy. We had a wedding to attend on Saturday, so we ended up going home to shower and change into our good clothes, then returned home to change back into our camping gear and return to the campsite.

DS and I took a little nature hike to burn off some excess energy and wander around the nature center, and try to see "Timber" the parks new mountain lion, on display, but he was sleeping in his cave. Maybe another trip.....

I took some pictures of the outside of the MH with the awning out, but I havent gotten to the inside, because DS took all of his toys & scattered them across the coach. Not to mention we're still in the phase of figuring out "what goes where".

I'll post them as soon as I get a chance.
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Old 05-20-2013, 07:38 AM   #23
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It must be the flux capacitor. Shoot it with some gama rays, that should work.

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Old 05-20-2013, 10:29 AM   #24
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Welcome aboard. You will get the bugs worked out as the rest of us have and all will be well. Luckly you sound like you have a handle on things and don't have to hire someone to do everything. Take you time, do some research here and other places and you will find your answers. Good luck with your new home. Seeya on the road....
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Old 05-20-2013, 08:33 PM   #25
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Originally Posted by jnp_macklin View Post
Next on the agenda is the HWH which fires, runs for about 4-5 seconds then shuts the gas off. I can restart the heater, and the process repeats. But the heater never stays fired for more than 5 seconds. I have checked for obstructions in the vent pipe, and its clear. Anyone have an idea?

I have LP (albeit less than 1/4 tank according to the gauge on the tank) and the stove-top, oven and LP fridge all fire and operate normally. I have not even ventured to the furnace at this point. Its going to be near 80* this weekend. I don't think I'm gonna need it. But we wont have hot water yet either...

So our shakedown run is back on....., but with cautious optimism.
I had the same exact problem with my Suburban HWH; I took the cover off and cleaned it out with an air hose which blew a lot of rust out, after that it has worked perfect each time I've used it. I hope yours is that easy to fix.


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