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12-09-2020, 04:23 PM
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#1
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Member
Brand: Thor Motor Coach
State: California
Posts: 85
THOR #12313
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Electric Water Heater
I own a Thor Windsport 29M. A few months ago while dry camping, our gas water heater did not work. I was able to fix that problem. However we are at a full hook up site currently and the electric water heater is not working. Thank you for any suggestions.
Kona Tom
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12-09-2020, 04:45 PM
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#2
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,389
THOR #7035
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If the electric element was ever turned on with no water in the heater tank then the element is burned open. Check it with a multimeter.
Check for 120 VAC at the element terminals first. If good, open the breaker to the water heater, remove one of the wires from the heating element and check the resistance of the element.
If no 120 VAC at the element check to make sure the water heater breaker is not tripped.
Some water heaters have a reset button on the heater as well.
Find your model number for the heater and download a manual for it.
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Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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12-09-2020, 04:54 PM
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#3
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Senior Member
Brand: Thor Motor Coach
Model: Citation
State: Texas
Posts: 920
THOR #8139
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A little more info.
Some rvs have a wall switch inside the RV, a lot more have a switch in the bottom left corner of the heater.
Check the breaker and switches.
If the wh was empty while the electricity was on the heating element is burned out.
120v wh heating elements are available at most hardware stores, lowes, homedepot etc.
Let us know and tell us what brand wh you have.
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12-09-2020, 10:14 PM
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#4
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Member
Brand: Thor Motor Coach
State: California
Posts: 85
THOR #12313
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It’s an Atwood. As far as I know the water tank was never empty. I see no switch at bottom left or any other location. Gas water heater working great, but not the electric.
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12-09-2020, 10:16 PM
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#5
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Member
Brand: Thor Motor Coach
State: California
Posts: 85
THOR #12313
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Picture of the unit.
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12-09-2020, 11:08 PM
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#6
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Senior Member
Brand: Thor Motor Coach
Model: Windsport 27K
State: Ohio
Posts: 266
THOR #989
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If you have an electric heating element it is on the back side of the heater. The 110 volt feed goes directly to it and the control relay. As suggested earlier download the manual for your specific heater.
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12-09-2020, 11:15 PM
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#7
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,389
THOR #7035
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Quote:
Originally Posted by Kona Tom
Attachment 27563
It’s an Atwood. As far as I know the water tank was never empty. I see no switch at bottom left or any other location. Gas water heater working great, but not the electric.
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A switch on the heater itself only applies to Suburban water heaters.
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Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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12-11-2020, 02:23 AM
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#9
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Member
Brand: Thor Motor Coach
State: California
Posts: 85
THOR #12313
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Thank you everyone for your suggestions. I have downloaded the Atwood manual and reviewed the sections on the electric elements. It’s almost impossible to check wiring and the black box from the inside. I may end up removing the heater. The prior threads on this matter were helpful.
When my gas heater wasn’t working I replaced the circuit board and the circuit cut off link. That fixed the gas water heater. Works great. I replaced the ECO and TStat Kit today thinking that might fix the electrical. Still no electric water heater. Tomorrow I’ll pull that heater out and check the wiring and heating element.
Thanks again for your help.
Kona Tom
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12-11-2020, 10:21 AM
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#10
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Senior Member
Brand: Keystone
Model: Sprinter
State: Florida
Posts: 1,422
THOR #15553
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Quote:
Originally Posted by Kona Tom
Attachment 27563
It’s an Atwood. As far as I know the water tank was never empty. I see no switch at bottom left or any other location. Gas water heater working great, but not the electric.
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Atwood does not have a switch bottom left.
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2011 Keystone Sprinter 323BHS. Retired Master Electrician. All Motor Homes are RV's. All RV's are not Motor Homes.
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12-11-2020, 10:22 AM
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#11
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Senior Member
Brand: Keystone
Model: Sprinter
State: Florida
Posts: 1,422
THOR #15553
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Quote:
Originally Posted by Kona Tom
Thank you everyone for your suggestions. I have downloaded the Atwood manual and reviewed the sections on the electric elements. It’s almost impossible to check wiring and the black box from the inside. I may end up removing the heater. The prior threads on this matter were helpful.
When my gas heater wasn’t working I replaced the circuit board and the circuit cut off link. That fixed the gas water heater. Works great. I replaced the ECO and TStat Kit today thinking that might fix the electrical. Still no electric water heater. Tomorrow I’ll pull that heater out and check the wiring and heating element.
Thanks again for your help.
Kona Tom
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call a mobile RV Tech.
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2011 Keystone Sprinter 323BHS. Retired Master Electrician. All Motor Homes are RV's. All RV's are not Motor Homes.
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12-12-2020, 02:48 AM
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#12
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Member
Brand: Thor Motor Coach
State: California
Posts: 85
THOR #12313
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Quote:
Originally Posted by cavie
call a mobile RV Tech.
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I think you might be right. I replaced the element and it’s still not working. When I opened the black box to remove the element I found two fried wires. After the repair I thought that would fix it, but no luck.
Now , I have a new circuit board, thermostat regulator, ECO, TStat and now a new element. Still no electric heat. The fuses and breaker are functioning. I have power flowing from white main wire entering the black element box. What’s interesting is the only way to cut the power to that main white wire is to turn off the breaker. The wall 110 switch does not turn off that power. Is that right?
I’m thinking the Mobil RV Repairman but are there any other steps I may have missed.
Mahalo, Tom
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12-12-2020, 03:07 AM
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#13
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Senior Member
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 4,183
THOR #6411
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Usually the water heater will have a 15 amp circuit breaker than controls the 120 volt power to the water heater's relay on the rear. The wall switch is a 12 volt switch and controls only the relay via the circuit board. With the 12 volt wall switch on and the 120 volt circuit breaker off, you should be able to test the control voltage to the relay.
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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12-12-2020, 03:33 AM
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#14
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Member
Brand: Thor Motor Coach
State: California
Posts: 85
THOR #12313
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Quote:
Originally Posted by Beau388
Usually the water heater will have a 15 amp circuit breaker than controls the 120 volt power to the water heater's relay on the rear. The wall switch is a 12 volt switch and controls only the relay via the circuit board. With the 12 volt wall switch on and the 120 volt circuit breaker off, you should be able to test the control voltage to the relay.
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Yes the water heater has a 15 amp breaker. I’ve tested the breaker and it’s fine. How do I test the control voltage? Pull the 12 Volt wall switch panel off? Would that keep it from working?
I tested the power going into the element box and it has power. Something at one point burned those two wires and that might be why I still don’t have electric heat. I’ve repaired those wires. The gas water heater works great, but not the electric. I’ve replace almost everything, but electric water heater still not working.
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12-12-2020, 04:57 AM
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#15
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Senior Member
Brand: Thor Motor Coach
Model: Windsport 27K
State: Ohio
Posts: 266
THOR #989
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Have you replaced or tested the relay that is right near the heating element, that is what turns it on and off? According to the wiring Diagram I have for our water heater the white (neutral) wire goes directly to one side of the heating element, the hot wire (black) goes to the relay and a short jumper goes from the relay to the other terminal on the element.There is a yellow wire that comes from the control board that activates the relay when the 12volt switch on the control panel is activated. I would check to see if the relay is receiving power on the yellow wire when you have the 12volt switch on. If the relay is good you should have 120volts at the element. Good luck.
In our mh the breaker is the only way to turn off the 120 power.
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12-12-2020, 04:59 AM
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#16
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Senior Member
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 4,183
THOR #6411
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Quote:
Originally Posted by Kona Tom
Yes the water heater has a 15 amp breaker. I’ve tested the breaker and it’s fine. How do I test the control voltage? Pull the 12 Volt wall switch panel off? Would that keep it from working?
I tested the power going into the element box and it has power. Something at one point burned those two wires and that might be why I still don’t have electric heat. I’ve repaired those wires. The gas water heater works great, but not the electric. I’ve replace almost everything, but electric water heater still not working.
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What I suggested is you test to see if the 12 volt power switch is actually supplying current to the relay and the relay is actually moving.
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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12-12-2020, 12:03 PM
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#17
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Senior Member
Brand: Thor Motor Coach
Model: Tuscany 42GX
State: Missouri
Posts: 1,158
THOR #9178
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You did purchase a 120v element?
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12-12-2020, 12:15 PM
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#18
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Senior Member
Brand: Thor Motor Coach
Model: Freedom Traveller A27
State: North Carolina
Posts: 2,447
THOR #17765
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Bless you brother. Your attitude is commendable. It hurts my heart to pay somebody to fix something that , in my mind, I know I can fix. Keep after it dude.
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12-12-2020, 03:49 PM
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#19
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Member
Brand: Thor Motor Coach
State: California
Posts: 85
THOR #12313
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Quote:
Originally Posted by lwmcguir
You did purchase a 120v element?
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Yes 120v
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12-12-2020, 04:13 PM
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#20
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Member
Brand: Thor Motor Coach
State: California
Posts: 85
THOR #12313
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Quote:
Originally Posted by Jimbo56
Bless you brother. Your attitude is commendable. It hurts my heart to pay somebody to fix something that , in my mind, I know I can fix. Keep after it dude.
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Exactly! However, my wife is looking at me oddly. I keep saying, “Honey, I just need this little part”.
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