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06-27-2020, 08:28 PM
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#1
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Junior Member
Brand: Thor Motor Coach
State: California
Posts: 10
THOR #19387
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Hi Everyone! I'm a newbie! And I have questions please!
I recently purchased a 2018 Thor Motorcoach 31 ft. C Class.
I can't seem to get the tankless hot water heater to work? I've tried the breakers, fuses, and there is no reset button. Can anyone enlighten me please? I figure being new to this it's probably operator error!
I added two photos
Thanks!
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06-27-2020, 08:35 PM
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#2
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Senior Member
Brand: Thor Motor Coach
Model: 2018 24.1 AXISSIXxSIX
State: Arizona
Posts: 6,762
THOR #13932
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We need symptoms.
No power
No lights
Thermostat won't change display
Tries to fire up.
I hear clicking
I don't hear clicking
Hot water side of faucet is running water
The display shows this:
I hear the burner kick on
I have turned on the main propane valve.
Come back with those answered.
Good well thought questions get answers, not guesses.
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06-27-2020, 08:42 PM
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#3
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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... And welcome to the Forum also!
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06-27-2020, 08:59 PM
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#4
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Axis/Vegas Enthusiast
Brand: Thor Motor Coach
Model: Axis 24.4
State: Michigan
Posts: 9,837
THOR #1150
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Congratulations and welcome.
From what I've read on here those tankless heaters require high pressure and some flow before they kick on.
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06-27-2020, 09:04 PM
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#5
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Junior Member
Brand: Thor Motor Coach
State: California
Posts: 10
THOR #19387
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Reply to questions from duckface
Hot water heater symptoms.
No power - we have power. Everything else works
No lights - lights completely functional
Thermostat won't change display -display doesn't turn on at all
Tries to fire up. - no
I hear clicking- no
I don't hear clicking
Hot water side of faucet is running water-yea
The display shows this:nothing. Won't turn on
I hear the burner kick on-no
I have turned on the main propane valve.yes. heat works and gas stove works
Come back with those answered.
Good well thought questions get answers, not guesses
Thanks!
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06-27-2020, 09:05 PM
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#6
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Junior Member
Brand: Thor Motor Coach
State: California
Posts: 10
THOR #19387
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Thank you!
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06-27-2020, 09:12 PM
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#7
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Senior Member
Brand: Thor Motor Coach
Model: Miramar 37.1
State: California
Posts: 2,460
THOR #12698
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You might have to physically check the fuses to be sure you don't have one burned out that controls the unit. The water pressure needs to be set between 50-55psi for the water heater to heat up. Are you getting water flow out of the hot water line? The temp needs to be set between 102-110. You need to start at the heater and follow the electrical back to the control unit to determine where the electrical problem is located. It could be at the back of the control unit itself.
Good luck and welcome to the forum.
Paul
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06-27-2020, 09:24 PM
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#8
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Senior Member
Brand: Thor Motor Coach
Model: 2018 24.1 AXISSIXxSIX
State: Arizona
Posts: 6,762
THOR #13932
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I believe, and don't take it as fact b3cuas3 this is from memory :
There's a small fuse behind the faceplate of the water heater control.
Since you have no lights on the heater control at all, a dead display on a dead control panel, it's electrical and not water pressure related.
I THINK the face pops off of the control to find the tiny fuse but I would unscrew the display from the wall and test for power going into the controller. If there's power at the back of it it's not a breaker or fuse within the coach.
If there is power there look at the circuit board for the tiny fuse.
If there isn't power there, your problem is within the coach wiring.
Your answers tell us it's not pressure or water related.
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06-28-2020, 12:10 AM
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#9
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Junior Member
Brand: Thor Motor Coach
State: California
Posts: 10
THOR #19387
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Thanks for responding
A fuse behind the face plate makes sense. We will try to see if that comes off. We saw the fuse on the circuit board, if, I think you are talking about the fuse on the circuit board on the tankless water heater itself, correct? That fuse is ok.
We're still working on it again.
Thanks,
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06-28-2020, 12:23 AM
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#10
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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Good luck!
In this case: getting into hot water is a good thing...
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06-28-2020, 12:30 AM
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#11
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Senior Member
Brand: Thor Motor Coach
Model: Miramar 37.1
State: California
Posts: 2,460
THOR #12698
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There is a reset button for the tankless hot water system. You need to remove the exterior cover. Look deep into the back usually upper left corner. There is a white button with a wire connected to it. It does not look like a button and it is not marked as the reset button. Just push it it(only goes in a couple of milimeters) and you should have hot water again. There is a You Tube Video on it if you type in Girard Tankless Hot Water Reset Button.
Paul
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06-28-2020, 12:35 AM
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#12
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Senior Member
Brand: Thor Motor Coach
Model: 2018 24.1 AXISSIXxSIX
State: Arizona
Posts: 6,762
THOR #13932
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No, I think there's a tiny fuse inside the actual control on the wall.
I might be confusing myself with the floor heater thermostat, but I saw a tiny fuse on one of them on that wall.
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06-28-2020, 01:32 AM
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#13
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Senior Member
Brand: Thor Motor Coach
Model: Compass 23TR
State: Yukon
Posts: 246
THOR #13409
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This may be way too simple - but have you checked to make sure your water heater is turned on? Open the heater door on the outside of your rig and look for an on/off switch. I turn my water heater off every fall and then back on in the spring.
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06-28-2020, 11:26 AM
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#14
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Senior Member
Brand: Thor Motor Coach
Model: Quantum RQ29
State: Ohio
Posts: 1,296
THOR #13648
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Quote:
Originally Posted by yukongrant
This may be way too simple - but have you checked to make sure your water heater is turned on? Open the heater door on the outside of your rig and look for an on/off switch. I turn my water heater off every fall and then back on in the spring.
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I turn mine off when I leave the campground, and turn it back on when setting up. I'm guilty of forgetting to turn it back on once.
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06-28-2020, 02:53 PM
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#15
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Junior Member
Brand: Thor Motor Coach
State: California
Posts: 10
THOR #19387
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Thank you, yes it may sound simple but I know it occurs often. It it on. We're stumped. Thanks
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06-30-2020, 12:09 PM
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#16
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Member
Brand: Thor Motor Coach
Model: 2020 Windsport 35M
State: Georgia
Posts: 52
THOR #18656
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Is it in bypass??
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John, Maureen, Poppy, Mr. Finn and Miss Lily
2020 Windsport 35M
2017 Jeep Cherokee
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06-30-2020, 02:16 PM
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#17
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Junior Member
Brand: Thor Motor Coach
State: California
Posts: 10
THOR #19387
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Hot water heater working
Hi Everyone,
First, I want to thank all of you for trying to help me with suggestions as to why the hot water heater was not working. Monday morning we woke up in the campground and my daughter said, "the hot water heater just turned on". I looked and sure enough it was on and we had hot water from then on. No idea what changed, or why it happened. The only thing we can figure is that, as someone said, sometimes an insect may get in blocking the connection. So, problem solved, mystery continues. We will see what happens the next time.
I appreciate everyone's help! And, I plan to have it checked with a certified mechanic when we get home.
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06-30-2020, 02:20 PM
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#18
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Junior Member
Brand: Thor Motor Coach
State: California
Posts: 10
THOR #19387
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Can you please explain bypass? I did not see anything in the owners manual about a bypass mode. So not sure how to determine that.
Thanks,
Carol
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07-04-2020, 06:18 PM
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#19
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Junior Member
Brand: Thor Motor Coach
State: Florida
Posts: 25
THOR #15668
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Check propoane is turned on. My Miramar 37.1 uses propane.
Also....
Has to be enough water pressure.
Fill your fresh water tank and use the water pump.
Most camp grounds don't have enough presure to activate .
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07-04-2020, 06:35 PM
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#20
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Junior Member
Brand: Thor Motor Coach
State: Colorado
Posts: 20
THOR #13138
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Make sure your water tank is at least 3/4 full. We own a 2017 Thor gemini and had the same problem....after having everything checked out with our RV guy, just filling the water tank worked!
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