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Old 06-02-2020, 06:08 PM   #1
completelymo's Avatar
Join Date: Sep 2013
Posts: 91
Jumper wires

I had a short that toasted my jumper wires for the 120v side of my Atwood MPD 93756 hot water heater. It fried my jumper wires that attached to the two 120v small thermostats on the hot water heater, accessed from the bathroom vanity.

I do not have a picture or manual that shows what the color of the jumper wires are and where they attach.

If anyone has this info please post so I can finish fixing my 120v side of my hot water heater ... the propane side works fine but I would like to have the choice between propane or electric again.

Thanks in advance for your help!

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1997 American Eagle 40 EVS

with 325 Cummins & Spartan chassis
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Old 06-02-2020, 08:28 PM   #2
Join Date: Mar 2019
Posts: 93
Maybe this will help.

1999 Fleetwood Bounder V10 F53
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Old 06-02-2020, 10:54 PM   #3
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*Black wire (120VAC HOT) comes from main AC Panel Circuit Breaker to the on/off switch
*Black wire from the 120VAC On/Off Switch goes to the T-stat terminal (far right terminal)
*Jumper wire (any color you want) goes from T-stat terminal (left terminal) to the ECO terminal (right terminal)
*Black Wire goes from ECO terminal (left terminal) to the Electric Element (right screw)
*White wire goes from element (left screw) back to main AC panel (Neutral wire)
*Green wire........Ground wire from main AC panel---goes to the stud welded to tank wall

New Switch
Atwood 91092/92059------6 gallon model
Atwood 91089-------------10 gallon model

T-stat/ECO Set
Atwood 91873----6 and 10 gallon use same

Atwood 91160/92249....120VAC 1400W screw in element

Terminal/spade connection

Small spade on T-stat terminals
Large spade on ECO terminals

Looks like jumper between t-stat & eco has bad connections, loose, dirty, corroded etc for that much heat to happen....melt wire, melted terminals
Is it time for YOUR Medication or Mine?
Dodge 3500 w/Tractor Motor & NUWA 5vr
US NAVY---USS Decatur DDG-31
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Old 06-04-2020, 01:42 PM   #4
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Join Date: Sep 2013
Posts: 91
Thank You!

Thank you Old-Biscuit for your help, that was what I was looking for! Hot water heater works perfect ... all new wires, spade connectors and TStat/ECO did the trick.

Great helpful web site ... thank you to all!!

BTW, the previous owner or repair place was responsible for the poor wiring ... I should have looked at it closer sooner as to avoid an almost fire situation.
1997 American Eagle 40 EVS

with 325 Cummins & Spartan chassis
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