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Old 09-05-2017, 10:48 AM   #1
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Atwood Water Heater Wiring Help

I currently have an Atwood GC10-3E water heater and purchased a GC10-4E to replace it. The 4E has blue, green, orange and white wiring and the 3E has blue, brown and green wiring. The green wire was connected to a white wire running from my rv. Not sure how this wiring is supposed to be done. Any advice would be great. Thanks.

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Old 09-05-2017, 11:38 AM   #2
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Welcome to iRV2.

Didn't the new water heater come with wiring instructions ?
Do you have a voltage multi-meter, with an " ohm " scale ?

I would SUSPECT that the green on the heater is a ground wire and the white wire from the RV is also a ground. BUT you need to be sure before you connect.

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Old 09-05-2017, 01:48 PM   #3
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No instructions. I was told it would be plug and play but as I learned, this is not the case. I spoke to some folks and learned I have to install an additional switch in order to make this work. They will be sending me some additional info. What I thought was odd was the green wire from the old heater was connected to a white wire.
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Old 09-05-2017, 01:54 PM   #4
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NO..it is NOT a 'plug and play' installation

3E version is 'old style' model with different controls....electric and propane separate

4E version incorporated electric/propane into ONE control scheme.....DC controls and common t-stats.

See pgs 23-25 of this manual for info and what wiring changes are needed

WHITE wire is DC from Electric ON/OFF Switch
ORANGE wire is DC from Propane ON/OFF Switch
GREEN wire regardless of version is DC NEG/GRD

4E/10E wiring

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Old 09-05-2017, 01:56 PM   #5
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Thank you for the info.
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Old 09-05-2017, 02:33 PM   #6
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Awesome. This helps a great deal.

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atwood, heat, heater, water, water heater, wiring

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