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Mlalonde · 11-26-2020, 04:34 AM

Good morning all and Happy Thanksgiving! So much to be thankful for today so I'm going to keep things positive but I need some expert help. I'll try to be brief.

2020 Alpine 3851RD purchased brand new about 2 months ago. Currently on third camping trip.

Unit has Suburban Nautilus RL tankless HWH system. Trip one, works like a champ. Trip 2, no hot water (I'll explain), then to dealer for three weeks, found no problems found, then trip three (where I'm typing this) no hot water.

Symptoms. HWH is propane only and propane is on and working fine (all other propane systems function like furnace, stove, etc.). So I have gas flow.

System uses "On Demand" control panel. Turn unit on, no spark, flame or fan icons. Displays temp desired and the little "play" icon representing the recirculate heating option (which won't turn on or off by the way). Run one, multiple, all hot water faucets to create flow. Great water pressure (even removed the water pressure regulator just in case). Won't show it's trying to spark, heck, won't show anything on the display except temp and "play" icon. Then after 30 seconds, shuts off (on demand goes back to "off" status). I've read everything I can find on the internet and in the manuals to no avail. I sense that my HWH is ok but the control panel is not functioning properly. OR the flow sensor is just not working. Why the dealer said no problems found is beyond me. They said "110 degrees is not hot enough to make it work and you need to be at 120". OK, so I changed it. Now it's even on 130 and still no hot water so..... Yeah.

Anyone ever have this issue and if so, is there some level of reset, etc.?

Again, we're blessed. Here at a great KOA in Oklahoma (casinos are open on Thanksgiving). They have hot water showers so I can't complain. But I'd like this resolved without taking it back to the dealer again (so they can keep it for another month) and them not fix it.

BTW, currently on city water connection, full hook ups. Might try to fill the fresh water holding tank and use the water pump to see if it makes any difference. Can't imagine it would.

Thank in advance, all for any input that may help.

Mitchell

11-26-2020, 04:34 AM	#1
Mlalonde Junior Member Join Date: Oct 2020 Location: Leander Posts: 4	On Demand Water Heater Control Issue Good morning all and Happy Thanksgiving! So much to be thankful for today so I'm going to keep things positive but I need some expert help. I'll try to be brief. 2020 Alpine 3851RD purchased brand new about 2 months ago. Currently on third camping trip. Unit has Suburban Nautilus RL tankless HWH system. Trip one, works like a champ. Trip 2, no hot water (I'll explain), then to dealer for three weeks, found no problems found, then trip three (where I'm typing this) no hot water. Symptoms. HWH is propane only and propane is on and working fine (all other propane systems function like furnace, stove, etc.). So I have gas flow. System uses "On Demand" control panel. Turn unit on, no spark, flame or fan icons. Displays temp desired and the little "play" icon representing the recirculate heating option (which won't turn on or off by the way). Run one, multiple, all hot water faucets to create flow. Great water pressure (even removed the water pressure regulator just in case). Won't show it's trying to spark, heck, won't show anything on the display except temp and "play" icon. Then after 30 seconds, shuts off (on demand goes back to "off" status). I've read everything I can find on the internet and in the manuals to no avail. I sense that my HWH is ok but the control panel is not functioning properly. OR the flow sensor is just not working. Why the dealer said no problems found is beyond me. They said "110 degrees is not hot enough to make it work and you need to be at 120". OK, so I changed it. Now it's even on 130 and still no hot water so..... Yeah. Anyone ever have this issue and if so, is there some level of reset, etc.? Again, we're blessed. Here at a great KOA in Oklahoma (casinos are open on Thanksgiving). They have hot water showers so I can't complain. But I'd like this resolved without taking it back to the dealer again (so they can keep it for another month) and them not fix it. BTW, currently on city water connection, full hook ups. Might try to fill the fresh water holding tank and use the water pump to see if it makes any difference. Can't imagine it would. Thank in advance, all for any input that may help. Mitchell